GC-706 re-impl PageStatusAlert

resource/styles/scss/_on-edit.scss

@@ -188,6 +188,18 @@ body.on-edit {
     }
   }
 
+  #page-status-alert .myadmin-alert {
+    position: absolute;
+    opacity: 0.8;
+    bottom: 42px;
+    right: 3px;
+    left: 3px;
+    box-shadow: 2px 2px 5px #666;
+
+    &:hover {
+      opacity: 1;
+    }
+  }
 
   &.builtin-editor {