UX: Ensure suggestions are left aligned

This PR ensures that suggestions are aligned to the left. By default, they are center aligned which looks odd when there are long lines of text.

Author: keegangeorge

assets/stylesheets/modules/ai-helper/common/ai-helper.scss

@@ -234,6 +234,10 @@
   z-index: z("composer", "dropdown");
 }
 
+.ai-suggestions-menu .btn {
+  text-align: left;
+}
+
 .mobile-view {
   .ai-category-suggester-content,
   .ai-tag-suggester-content,