FIX: The "Add Control Scheme..." popup now requires explicit Save/Close user action (case ISXB-1131) (#2044)

* [Input System] The "Add Control Scheme..." popup now requires explicit Save/Close user action (case ISXB-1131)

o Previously clicking outside the popup window (anywhere in the editor) would close the popup window.

o This would leave a new blank (unnamed, orphaned) control scheme populating the UI - this was confusing.

o Now this popup will persist until the user explictly chooses to Save or Cancel.

* [Input System] Added CHANGELOG entry for "Add Control Scheme..." popup fix (case ISXB-1131)

* [Input System] Fix typo in CHANGELOG entry - removed extraneous final closing parenthesis.

* [Input System] Licensing failure - try limiting to version 2021.3.45f

Author: AlexTyrer

.yamato/config.metadata

@@ -1,5 +1,5 @@
 editors:
-  - version: 2021.3
+  - version: 2021.3.45f
   - version: 2022.3
     disable_tvos_run: true
   - version: 6000.0

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -18,6 +18,7 @@ however, it has to be formatted properly to pass verification tests.
 - Fixed ISubmitHandler.OnSubmit event processing when operating in Manual Update mode (ISXB-1141)
 - Fixed Rename mode is not entered and name is autocompleted to default when creating a new Action Map on 2022.3. [ISXB-1151](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1151)
 - Fixed unexpected control scheme switch when using `OnScreenControl` and pointer based schemes which registed "Cancel" event on every frame.[ISXB-656](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-656)
+- Fixed an issue with The "Add Control Scheme..." popup window so that it now persists until any changes are explicitly Saved or Cancelled [case ISXB-1131](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1131)
 
 ### Changed
 - Added back the InputManager to InputSystem project-wide asset migration code with performance improvement (ISX-2086)

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/Views/ControlSchemesView.cs

@@ -63,7 +63,6 @@ public ControlSchemesView(VisualElement root, StateContainer stateContainer, boo
             m_ModalWindow.Add(popupWindow);
             root.Add(m_ModalWindow);
             m_ModalWindow.StretchToParentSize();
-            m_ModalWindow.RegisterCallback<ClickEvent>(evt => CloseView());
             popupWindow.RegisterCallback<ClickEvent>(evt => evt.StopPropagation());
 
             m_ListView = controlSchemeVisualElement.Q<MultiColumnListView>(kControlSchemesListView);