Lower .floating-nav-link z-index to be below chat panes

app/styles/basics.scss

@@ -227,7 +227,7 @@ noscript {
   bottom: 0;
   left: 0;
   position: absolute;
-  z-index: 9999;
+  z-index: 201;
   background: transparent;
   border: 0;
   margin: 0;

app/styles/components/profile_hover_card.scss

@@ -14,7 +14,7 @@
   transition-property: opacity;
   transition-duration: 0.2s;
   width: 320px;
-  z-index: 998;
+  z-index: 200;
   left: -10px;
   padding: 20px;
   margin-bottom: 10px;