Fix Scribe mobile issues

- Fix Scribe replace on mobile when opened from menu bar (to be complete
this fix needs this PR https://github.com/Enough-Software/enough_html_editor/pull/37)
- Ensure all mobile editor call are awaited
- Do not clear text if a selection has been restored (which mean we replace a selection)
- Avoid collapseToEnd crash

lib/features/composer/presentation/controller/rich_text_mobile_tablet_controller.dart

@@ -21,7 +21,10 @@ class RichTextMobileTabletController extends GetxController {
 
   Future<void> focus() async {
     try {
-      await htmlEditorApi?.webViewController.evaluateJavascript(source: "document.getElementById('editor').focus();");
+      await htmlEditorApi?.webViewController.evaluateJavascript(source: '''
+      (() => {
+        document.getElementById('editor').focus();
+      })();''');
     } catch (e) {
       logWarning('RichTextMobileTabletController::focus:Exception: $e');
     }