Add large link, no hint variant to file-list

At present the file-list pattern assumes each
item has hint text below the link and so increases
the hit area to overlap the hint. This adds a
variant for items without one and uses it on the
page for choosing an alert sub-area.

app/assets/stylesheets/views/dashboard.scss

@@ -68,6 +68,14 @@
     margin-top: -10px;
   }
 
+  &-filename-large-no-hint {
+    padding-bottom: 0;
+    padding-top: 5px;
+    margin-bottom: 0;
+    margin-top: 5px;
+    overflow: visible; // don't cut off thicker underline
+  }
+
   &-filename-unlinked {
     @include core-19;
   }