Make dashboards table conform to reveal-on-hover pattern

ui/src/dashboards/containers/DashboardsPage.js

@@ -87,7 +87,7 @@ const DashboardsPage = React.createClass({
                     <button className="btn btn-sm btn-primary" onClick={this.handleCreateDashbord}>Create Dashboard</button>
                   </div>
                   <div className="panel-body">
-                    <table className="table v-center">
+                    <table className="table v-center admin-table">
                       <thead>
                         <tr>
                           <th>Name</th>