Make issuable dashboard dropdowns consistent

app/assets/stylesheets/framework/dropdowns.scss

@@ -771,6 +771,11 @@
           &::before {
             top: 16px;
           }
+
+          &.dropdown-menu-user-link::before {
+            top: 50%;
+            transform: translateY(-50%);
+          }
         }
       }
     }

app/assets/stylesheets/framework/filters.scss

@@ -478,3 +478,7 @@
   padding: 8px 16px;
   text-align: center;
 }
+
+.issues-details-filters {
+  @include new-style-dropdown;
+}