Added handleKeySubmit method to match EE

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

@@ -149,6 +149,9 @@ export default {
 
       return shouldResolve || shouldToggleState;
     },
+    handleKeySubmit() {
+      this.handleUpdate();
+    },
     handleUpdate(shouldResolve) {
       const beforeSubmitDiscussionState = this.discussionResolved;
       this.isSubmitting = true;
@@ -216,8 +219,8 @@ export default {
           class="note-textarea js-gfm-input js-note-text js-autosize markdown-area js-vue-issue-note-form js-vue-textarea qa-reply-input"
           aria-label="Description"
           placeholder="Write a comment or drag your files here…"
-          @keydown.meta.enter="handleUpdate();"
-          @keydown.ctrl.enter="handleUpdate();"
+          @keydown.meta.enter="handleKeySubmit();"
+          @keydown.ctrl.enter="handleKeySubmit();"
           @keydown.up="editMyLastNote();"
           @keydown.esc="cancelHandler(true);"
         ></textarea>