feat: clear selection extra info before inserting a new line (#1009)

* feat: enable debug paint size for mobile drag handle

* fix: clear selection extra info when inserting new line

* Revert "feat: enable debug paint size for mobile drag handle"

This reverts commit 3ece3c6.

example/lib/pages/mobile_editor.dart

@@ -1,6 +1,7 @@
 import 'package:appflowy_editor/appflowy_editor.dart';
 import 'package:flutter/material.dart';
 import 'package:google_fonts/google_fonts.dart';
+import 'package:universal_platform/universal_platform.dart';
 
 class MobileEditor extends StatefulWidget {
   const MobileEditor({
@@ -43,8 +44,6 @@ class _MobileEditorState extends State<MobileEditor> {
 
     editorStyle = _buildMobileEditorStyle();
     blockComponentBuilders = _buildBlockComponentBuilders();
-
-    editorState.debugInfo.debugPaintSizeEnabled = true;
   }
 
   @override
@@ -127,7 +126,9 @@ class _MobileEditorState extends State<MobileEditor> {
       ),
       padding: const EdgeInsets.symmetric(horizontal: 24.0),
       magnifierSize: const Size(144, 96),
-      mobileDragHandleBallSize: const Size.square(8),
+      mobileDragHandleBallSize: UniversalPlatform.isIOS
+          ? const Size.square(12)
+          : const Size.square(8),
       mobileDragHandleLeftExtend: 12.0,
       mobileDragHandleWidthExtend: 24.0,
     );

lib/src/editor/command/text_commands.dart

@@ -80,6 +80,8 @@ extension TextTransforms on EditorState {
         offset: 0,
       ),
     );
+    transaction.selectionExtraInfo = {};
+    transaction.customSelectionType = SelectionType.inline;
 
     // Apply the transaction.
     return apply(transaction);