FIX: allow pasting links into title field that are longer than the max title length

app/assets/javascripts/discourse/components/composer-title.js.es6

@@ -31,6 +31,13 @@ export default Ember.Component.extend({
     }
   },
 
+  @computed('watchForLink')
+  titleMaxLength() {
+    // maxLength gets in the way of pasting long links, so don't use it if featured links are allowed.
+    // Validation will display a message if titles are too long.
+    return this.get('watchForLink') ? null : this.siteSettings.max_topic_title_length;
+  },
+
   @observes('composer.titleLength', 'watchForLink')
   _titleChanged() {
     if (this.get('composer.titleLength') === 0) { this.set('autoPosted', false); }

app/assets/javascripts/discourse/templates/components/composer-title.hbs

@@ -1,7 +1,7 @@
 {{text-field value=composer.title
              tabindex="2"
              id="reply-title"
-             maxLength=siteSettings.max_topic_title_length
+             maxLength=titleMaxLength
              placeholderKey=composer.titlePlaceholder
              disabled=composer.loading}}