Implement function to properly get the size of the value editor for an InputBox.

Source/Editor/Surface/Elements/InputBox.cs

@@ -1652,5 +1652,35 @@ namespace FlaxEditor.Surface.Elements
                 }
             }
         }
+
+        /// <summary>
+        /// Get the size of the value editor for this box.
+        /// </summary>
+        /// <returns>The size of the value editor for this box.</returns>
+        public Float2 GetValueEditorSize()
+        {
+            if (!HasValue)
+                return Float2.Zero;
+
+            if (_defaultValueEditor != null)
+                return _defaultValueEditor.Bounds.Size;
+
+            for (int i = 0; i < DefaultValueEditors.Count; i++)
+            {
+                if (DefaultValueEditors[i].CanUse(this, ref _currentType))
+                {
+                    var bounds = new Rectangle(X + Width + 8 + Style.Current.FontSmall.MeasureText(Text).X, Y, 90, Height);
+                    _editor = DefaultValueEditors[i];
+
+                    // TODO: Find a better way to evaluate the size than using existing create code to resolve the size for each editor type.
+                    var tempEditor = _editor.Create(this, ref bounds);
+                    Float2 editorSize = tempEditor.Size;
+                    tempEditor.Dispose();
+                    return editorSize;
+                }
+            }
+
+            return Float2.Zero;
+        }
     }
 }