Bug 1434456 - Remove scrollbar from shortcut table in userguide

ui/css/treeherder-global.css

@@ -410,7 +410,7 @@ h4 {
     width:100%;
 }
 
-#shortcut-table-card {
+#onscreen-shortcuts div div.card {
     max-height: 90vh;
     overflow: auto;
 }

ui/partials/main/thShortcutTable.html

@@ -1,4 +1,4 @@
-<div class="card" id="shortcut-table-card">
+<div class="card">
   <div class="card-header">
     <h3>Keyboard shortcuts
       <a ng-show="onscreenShortcutsShowing"