Add note error handler as entries for JH overriding

app/assets/javascripts/notes/components/noteable_discussion.vue

@@ -223,17 +223,20 @@ export default {
         })
         .catch((err) => {
           this.removePlaceholderNotes();
-          const msg = __(
-            'Your comment could not be submitted! Please check your network connection and try again.',
-          );
-          createFlash({
-            message: msg,
-            parent: this.$el,
-          });
+          this.handleSaveError(err); // The 'err' parameter is being used in JH, don't remove it
           this.$refs.noteForm.note = noteText;
           callback(err);
         });
     },
+    handleSaveError() {
+      const msg = __(
+        'Your comment could not be submitted! Please check your network connection and try again.',
+      );
+      createFlash({
+        message: msg,
+        parent: this.$el,
+      });
+    },
     deleteNoteHandler(note) {
       this.$emit('noteDeleted', this.discussion, note);
     },

app/assets/javascripts/notes/components/noteable_note.vue

@@ -331,17 +331,20 @@ export default {
             this.isEditing = true;
             this.setSelectedCommentPositionHover();
             this.$nextTick(() => {
-              const msg = __('Something went wrong while editing your comment. Please try again.');
-              createFlash({
-                message: msg,
-                parent: this.$el,
-              });
+              this.handleUpdateError(response); // The 'response' parameter is being used in JH, don't remove it
               this.recoverNoteContent(noteText);
               callback();
             });
           }
         });
     },
+    handleUpdateError() {
+      const msg = __('Something went wrong while editing your comment. Please try again.');
+      createFlash({
+        message: msg,
+        parent: this.$el,
+      });
+    },
     formCancelHandler({ shouldConfirm, isDirty }) {
       if (shouldConfirm && isDirty) {
         // eslint-disable-next-line no-alert