fix: Fix bug that prevented editing workspace comments on Firefox. (#8779)

* fix: Fix bug that prevented editing workspace comments on Firefox.

* chore: Add a docstring for getTextArea().

* refactor: Use isTargetInput() instead of comparing to comment textarea.

Author: gonfunko

core/comments/rendered_workspace_comment.ts

@@ -208,8 +208,14 @@ export class RenderedWorkspaceComment
   private startGesture(e: PointerEvent) {
     const gesture = this.workspace.getGesture(e);
     if (gesture) {
-      gesture.handleCommentStart(e, this);
-      this.workspace.getLayerManager()?.append(this, layers.BLOCK);
+      if (browserEvents.isTargetInput(e)) {
+        // If the text area was the focus, don't allow this event to bubble up
+        // and steal focus away from the editor/comment.
+        e.stopPropagation();
+      } else {
+        gesture.handleCommentStart(e, this);
+        this.workspace.getLayerManager()?.append(this, layers.BLOCK);
+      }
       common.setSelected(this);
     }
   }