Fix pointer events in #settings overlay form sidebar.

The pointer events for the sidebar were incorrect in the way they
were set such that when the sidebar was off to the right and
hidden it would still attract pointer events.

static/styles/settings.css

@@ -766,10 +766,12 @@ input[type=checkbox].inline-block {
     background-color: #fff;
     border-left: 1px solid #ddd;
 
+    pointer-events: none;
     transition: all 0.3s ease;
 }
 
 #settings_page .form-sidebar.show {
+    pointer-events: auto;
     transform: translateX(0px);
 }