FIX: ensures ctrl+enter from textarea saves (#566)

assets/javascripts/discourse/components/modal/edit-topic-assignments.gjs

@@ -47,7 +47,10 @@ export default class EditTopicAssignments extends Component {
   <template>
     <DModal class="assign" @title={{this.title}} @closeModal={{@closeModal}}>
       <:body>
-        <TopicAssignments @assignments={{this.assignments}} />
+        <TopicAssignments
+          @assignments={{this.assignments}}
+          @onSubmit={{this.submit}}
+        />
       </:body>
       <:footer>
         <DButton

assets/javascripts/discourse/components/topic-assignments.gjs

@@ -41,7 +41,7 @@ export default class TopicAssignments extends Component {
     </div>
     <Assignment
       @assignment={{this.selectedAssignment}}
-      @onSubmit={{this.submit}}
+      @onSubmit={{this.args.onSubmit}}
       @showValidationErrors={{false}}
     />
   </template>

spec/system/assign_topic_spec.rb

@@ -35,6 +35,20 @@
       expect(page).to have_no_css("#topic .assigned-to")
     end
 
+    it "can submit form with shortcut from texatea" do
+      visit "/t/#{topic.id}"
+
+      topic_page.click_assign_topic
+      assign_modal.assignee = staff_user
+
+      find("body").send_keys(:tab)
+      find("body").send_keys(:control, :enter)
+
+      expect(assign_modal).to be_closed
+      expect(topic_page).to have_assigned(user: staff_user, at_post: 2)
+      expect(find("#topic .assigned-to")).to have_content(staff_user.username)
+    end
+
     context "when assigns are not public" do
       before { SiteSetting.assigns_public = false }