Adjust button animation rates

Author: Rampastring

src/TSMapEditor/UI/Controls/EditorButton.cs

@@ -12,6 +12,7 @@ public EditorButton(WindowManager windowManager) : base(windowManager)
         {
             FontIndex = Constants.UIBoldFont;
             Height = Constants.UIButtonHeight;
+            AlphaRate = 0.005f; // Override default animation rate in UISettings
         }
 
         public Texture2D ExtraTexture { get; set; }

src/TSMapEditor/UI/UIManager.cs

@@ -28,6 +28,7 @@ public CustomUISettings()
             CheckBoxDisabledClearTexture = AssetLoader.LoadTexture("checkBoxClearD.png");
             PanelBackgroundColor = new Color(0, 0, 0, 128);
             PanelBorderColor = new Color(128, 128, 128, 255);
+            DefaultAlphaRate = 1.0f; // ScrollBar textures need instant animations
         }
 
         public Color ListBoxBackgroundColor { get; set; } = Color.Black;