Show combobox only when editing topic assignments

assets/javascripts/discourse/components/assign-user-form.hbs

@@ -1,10 +1,12 @@
-<div class="control-group">
-  <label>{{i18n "discourse_assign.assign_modal.assignment_label"}}</label>
-  <ComboBox
-    @value={{1}}
-    @content={{this.assignments}}
-  />
-</div>
+{{#if this.editingTopicAssignments}}
+  <div class="control-group">
+    <label>{{i18n "discourse_assign.assign_modal.assignment_label"}}</label>
+    <ComboBox
+      @value={{1}}
+      @content={{this.assignments}}
+    />
+  </div>
+{{/if}}
 
 <div class="control-group {{if this.assigneeError 'assignee-error'}}">
   <label>{{i18n "discourse_assign.assign_modal.assignee_label"}}</label>

assets/javascripts/discourse/components/assign-user-form.js

@@ -32,6 +32,10 @@ export default class AssignUserForm extends Component {
       .map((status) => ({ id: status, name: status }));
   }
 
+  get editingTopicAssignments() {
+    return this.args.model.targetType === "Topic" && this.args.model.reassign;
+  }
+
   get status() {
     return (
       this.args.model.status || this.siteSettings.assign_statuses.split("|")[0]

assets/javascripts/discourse/components/modal/assign-user.js

@@ -19,13 +19,17 @@ export default class AssignUser extends Component {
       return I18n.t("discourse_assign.assign_post_modal.title");
     }
 
-    if (this.model.reassign) {
+    if (this.editingTopicAssignments) {
       return I18n.t("discourse_assign.assign_modal.edit_assignments_title");
     } else {
       return I18n.t("discourse_assign.assign_modal.title");
     }
   }
 
+  get editingTopicAssignments() {
+    return this.model.targetType === "Topic" && this.model.reassign;
+  }
+
   @action
   async onSubmit() {
     this.args.closeModal();