correct selectors for notifications, hover lightening

app/javascript/flavours/glitch/styles/neuromatchstodon/bigger_collapsed_statuses.scss

@@ -18,6 +18,12 @@ $notification-collapsed-height: 6em;
         // "See more" button
         &__spoiler-link {
           background: $action-button-color;
+
+          &:hover,
+          &:focus {
+            background: lighten($action-button-color, 7%);
+            text-decoration: none;
+          }
         }
       }
 
@@ -28,6 +34,15 @@ $notification-collapsed-height: 6em;
   }
 }
 
-.notification-ungrouped .status__wrapper.collapsed .status__content {
+// set a smaller height for previews of longposts in notifications
+// The component structure is different depending on whether
+// grouped notifications is enabled or not, and whether
+// something is an interaction or not - there isn't a
+// class given for "notifications" so we have to improvise
+.notification-ungrouped .status__wrapper.collapsed .status__content,
+.notification__filter-bar
+  + .scrollable
+  .status__wrapper.collapsed
+  .status__content {
   max-height: $notification-collapsed-height;
 }