TextEditor: add force update current Editor in action handler

This can be used to update the editor widget connected in the action
handler if the editor widget inside one editor changes.

Change-Id: Idc9ea119aa2eaab34bd249c59ab9dfb255556fa1
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/texteditor/texteditoractionhandler.cpp

@@ -565,4 +565,9 @@ TextEditorActionHandler::~TextEditorActionHandler()
     delete d;
 }
 
+void TextEditorActionHandler::updateCurrentEditor()
+{
+    d->updateCurrentEditor(Core::EditorManager::currentEditor());
+}
+
 } // namespace TextEditor

src/plugins/texteditor/texteditoractionhandler.h

@@ -49,6 +49,8 @@ public:
     uint optionalActions() const;
     ~TextEditorActionHandler();
 
+    void updateCurrentEditor();
+
 private:
     Internal::TextEditorActionHandlerPrivate *d;
 };