FIX: Select dropdown menu for Path in Input Actions Editor from any position in Path button (#2114)

Author: tspiller

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -17,6 +17,7 @@ however, it has to be formatted properly to pass verification tests.
 - Fixed an issue causing InvalidOperationException when entering playmode with domain reload disabled. [ISXB-1208](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1208).
 - Fixed an issue where compiling Addressables with Input System package present would result in failed compilation due to `IInputAnalytic.TryGatherData` not being defined [ISXB-1203](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1203).
 - Pinned Touch Samples sample package dependencies to avoid errors with Cinemachine 3.x and Probuilder 6.x. [ISXB-1245](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1245)
+- Fixed an issue where dropdown menu for Path in Input Actions Editor could not be selected from any button position. [ISXB-1309](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1309)
 
 ## [1.12.0] - 2025-01-15
 

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPathEditor.cs

@@ -96,18 +96,17 @@ public void OnGUI(Rect rect, GUIContent label = null, SerializedProperty propert
 
             var lineRect = rect;
             var labelRect = lineRect;
-            labelRect.width = EditorGUIUtility.labelWidth;
+            labelRect.width = EditorStyles.label.CalcSize(pathLabel).x + 20; // Fit to label with some padding
             EditorGUI.LabelField(labelRect, pathLabel);
             lineRect.x += labelRect.width;
             lineRect.width -= labelRect.width;
 
             var bindingTextRect = lineRect;
             var editButtonRect = lineRect;
 
-            var bindingTextRectOffset = 80;
-            bindingTextRect.width += bindingTextRectOffset;
-            bindingTextRect.x -= bindingTextRectOffset + 20;
-            editButtonRect.x = bindingTextRect.x + bindingTextRect.width; // Place it directly after the textRect
+            bindingTextRect.x = labelRect.x + labelRect.width; // Place directly after labelRect
+            editButtonRect.x += lineRect.width - 20; // Place at the edge of the window to appear after bindingTextRect
+            bindingTextRect.width = editButtonRect.x - bindingTextRect.x; // bindingTextRect fills remaining space between label and editButton
             editButtonRect.width = 20;
             editButtonRect.height = 15;