Update RawEditorState get selectionOverlay

lib/src/widgets/editor.dart

@@ -53,7 +53,7 @@ abstract class EditorState extends State<RawEditor>
 
   RenderEditor get renderEditor;
 
-  EditorTextSelectionOverlay? getSelectionOverlay();
+  EditorTextSelectionOverlay? get selectionOverlay;
 
   /// Controls the floating cursor animation when it is released.
   /// The floating cursor is animated to merge with the regular cursor.

lib/src/widgets/raw_editor.dart

@@ -238,7 +238,7 @@ class RawEditorState extends EditorState
 
   // Selection overlay
   @override
-  EditorTextSelectionOverlay? getSelectionOverlay() => _selectionOverlay;
+  EditorTextSelectionOverlay? get selectionOverlay => _selectionOverlay;
   EditorTextSelectionOverlay? _selectionOverlay;
 
   @override

lib/src/widgets/raw_editor/raw_editor_state_selection_delegate_mixin.dart

@@ -99,8 +99,9 @@ mixin RawEditorStateSelectionDelegateMixin on EditorState
 
   @override
   void hideToolbar([bool hideHandles = true]) {
-    if (getSelectionOverlay()?.toolbar != null) {
+    // If the toolbar is currently visible.
-      getSelectionOverlay()?.hideToolbar();
+    if (selectionOverlay?.toolbar != null) {
+      selectionOverlay?.hideToolbar();
     }
   }