FIX: Use context sensitive "create topic" via keyboard if possible

app/assets/javascripts/discourse/lib/keyboard-shortcuts.js.es6

@@ -196,12 +196,21 @@ export default {
   },
 
   createTopic() {
-    if (this.currentUser && this.currentUser.can_create_topic) {
+    if (!(this.currentUser && this.currentUser.can_create_topic)) {
+      return;
+    }
+
+    // If the page has a create-topic button, use it for context sensitive attributes like category
+    let $createTopicButton = $("#create-topic");
+    if ($createTopicButton.length) {
+      $createTopicButton.click();
+      return;
+    }
+
     this.container.lookup("controller:composer").open({
       action: Composer.CREATE_TOPIC,
       draftKey: Composer.CREATE_TOPIC
     });
-    }
   },
 
   focusComposer() {