[VFX] Indeterminate state not updated and label size changing

### Jira UUM-68044
Steps to reproduce:
1. Import (or reproduce) attached VFX
2. Observe first computed value in UX of Add
=> Expected intermediate status with `-`

Actual results
<img src="https://jira.unity3d.com/secure/attachment/1415346/1415346_image-2024-03-26-17-42-08-042.png" width="500" />
Expected results
<img src="https://jira.unity3d.com/secure/attachment/1415345/1415345_image-2024-03-26-17-42-55-937.png" width="500" />

### Jira UUM-68140
Steps to reproduce:
1. Open VFX
2. Create Update Context
3. Create block Set Axis X
4. Open Inspector change axis to Axis Z
5. Observe weird alignment of UI components

Actual results
<img src="https://jira.unity3d.com/secure/attachment/1416292/1416292_image-2024-03-27-17-28-31-096.png" width="500" />
Expected results
<img src="https://jira.unity3d.com/secure/attachment/1416298/1416298_image-2024-03-27-17-39-57-915.png" width="500" />

![Video](https://jira.unity3d.com/secure/attachment/1416293/_moving_alignement.mp4)

In this same bug another issue is raised:
When unlinking an edge on a collapsed port, the previously linked port is not hidden
![Unity_rcHEhtGQOe](https://media.github.cds.internal.unity3d.com/user/4003/files/4afec272-efce-4a83-8341-a5a6ddc7c323)

Author: julienamsellem

Packages/com.unity.visualeffectgraph/Editor/GraphView/Elements/VFXNodeUI.cs

@@ -166,9 +166,10 @@ public virtual void OnControllerChanged(ref ControllerChangedEvent e)
 
         protected virtual bool HasPosition() => true;
 
-        protected void SyncSettings()
+        private bool SyncSettings()
         {
             Profiler.BeginSample("VFXNodeUI.SyncSettings");
+            var hasChanged = false;
             var settings = controller.settings;
             var graphSettings = controller.model.GetSettings(false, VFXSettingAttribute.VisibleFlags.InGraph).ToArray();
 
@@ -179,6 +180,7 @@ protected void SyncSettings()
                 {
                     propertyRM.RemoveFromHierarchy();
                     m_Settings.Remove(propertyRM);
+                    hasChanged = true;
                 }
             }
 
@@ -191,6 +193,7 @@ protected void SyncSettings()
                     var setting = settings.Single(x => string.Compare(x.name, vfxSetting.field.Name, StringComparison.OrdinalIgnoreCase) == 0);
                     var propertyRM = AddSetting(setting);
                     settingsContainer.Insert(i, propertyRM);
+                    hasChanged = true;
                 }
             }
 
@@ -215,18 +218,17 @@ protected void SyncSettings()
             }
 
             Profiler.EndSample();
+            return hasChanged;
         }
 
-        void SyncAnchors()
+        bool SyncAnchors()
         {
             Profiler.BeginSample("VFXNodeUI.SyncAnchors");
             var hasResync = SyncAnchors(controller.inputPorts, inputContainer, controller.HasActivationAnchor);
             hasResync |= SyncAnchors(controller.outputPorts, outputContainer, false);
-            if (hasResync)
-            {
-                RefreshLayout();
-            }
             Profiler.EndSample();
+
+            return hasResync;
         }
 
         bool SyncAnchors(ReadOnlyCollection<VFXDataAnchorController> ports, VisualElement container, bool hasActivationPort)
@@ -373,15 +375,18 @@ protected virtual void SelfChange()
 
             base.expanded = controller.expanded;
 
-            SyncSettings();
-            SyncAnchors();
+            var needRefresh = SyncSettings();
+            needRefresh |= SyncAnchors();
             Profiler.BeginSample("VFXNodeUI.SelfChange The Rest");
             RefreshExpandedState();
             Profiler.EndSample();
             Profiler.EndSample();
 
-
             UpdateCollapse();
+            if (needRefresh)
+            {
+                EditorApplication.delayCall += RefreshLayout;
+            }
         }
 
         protected virtual VFXDataAnchor InstantiateDataAnchor(VFXDataAnchorController ctrl, VFXNodeUI node)

Packages/com.unity.visualeffectgraph/Editor/GraphView/Elements/VFXOperatorUI.cs

@@ -6,7 +6,7 @@ namespace UnityEditor.VFX.UI
 {
     class VFXOperatorUI : VFXNodeUI
     {
-        private const float defaultOperatorLabelWidth = 30f;
+        private const float defaultOperatorLabelWidth = 10f;
 
         VisualElement m_EditButton;
         VisualElement m_EditContainer;

Packages/com.unity.visualeffectgraph/Editor/GraphView/Views/Controller/VFXViewController.cs

@@ -390,6 +390,8 @@ private bool RecreateNodeEdges()
             foreach (var node in nodeToUpdate)
             {
                 node.UpdateAllEditable();
+                // Mark model as changed since it's connections have changed
+                OnObjectModified(node.model, false);
             }
 
             return nodeToUpdate.Any();

Packages/com.unity.visualeffectgraph/Editor/GraphView/Views/Properties/NumericPropertiesRM.cs

@@ -21,13 +21,9 @@ public override float GetPreferredControlWidth()
 
         protected override void UpdateIndeterminate()
         {
-            if (field is BaseField<float> floatField)
+            if (field is IMixedValueSupport mixedValueSupport)
             {
-                floatField.showMixedValue = indeterminate;
-            }
-            else if (field is BaseField<int> intField)
-            {
-                intField.showMixedValue = indeterminate;
+                mixedValueSupport.showMixedValue = indeterminate;
             }
 
             if (m_Slider != null)
@@ -54,7 +50,7 @@ public override INotifyValueChanged<U> CreateField()
             VisualElement createdField;
             if (!HasValidRange(range))
             {
-                createdField = CreateSimpleField(ObjectNames.NicifyVariableName(provider.name));
+                createdField = CreateSimpleField(string.IsNullOrEmpty(provider.name) ? "  " : ObjectNames.NicifyVariableName(provider.name));
                 m_TextField = createdField.Q<TextElement>(null, "unity-text-element__selectable");
                 if (m_TextField != null)
                 {

Packages/com.unity.visualeffectgraph/Editor/UIResources/uss/PropertyRM.uss

@@ -133,11 +133,6 @@
     -unity-text-align: middle-left;
 }
 
-/*.propertyrm .fieldContainer > *
-{
-    flex:1 1 auto;
-}*/
-
 .propertyrm:disabled
 {
     opacity: 1;
@@ -156,10 +151,10 @@
     padding-left:0;
 }
 
-.propertyrm .fieldContainer, .propertyrm .unity-float-field
+.propertyrm .fieldContainer
 {
     flex-direction:row;
-    flex:1 1 auto;
+    flex:1 0 auto;
     height: auto;
     margin-top: 0;
     margin-bottom: 0;
@@ -244,12 +239,6 @@ ColorPropertyRM .unity-float-field
     flex: 1 0 auto;
 }
 
-FloatPropertyRM .unity-float-field
-{
-    align-self:flex-end;
-    flex:1 0 auto;
-}
-
 IntPropertyRM .unity-integer-field
 {
     align-self:flex-end;

Packages/com.unity.visualeffectgraph/Editor/UIResources/uss/VFXDataAnchor.uss

@@ -85,7 +85,6 @@ VFXContextUI #output .VFXDataAnchor.port #connector
     padding-right: 0;
     margin-left: 0;
     flex-direction: row;
-    /*flex-direction: row-reverse;*/
 }
 
 .VFXDataAnchor.Output #type {