disable banner gradient once it is clicked

bfrontend/src/Components/Channels/ChannelView.js

@@ -60,7 +60,7 @@ const ChannelView = ({ channels, messages, channel, selectedChannelId, experimen
                     </button>}
                 </div>
 
-                {(gradientBannerNotificationText !== undefined) && <div className="gradient-banner-card">
+                {(gradientBannerNotificationText !== undefined) && <div className="gradient-banner-card" onClick={ () => dispatch({ type: "application/updatebannertext", text: undefined }) }>
                     { gradientBannerNotificationText }
                 </div>}
 

bfrontend/src/Styles/Components/Card.scss

@@ -78,4 +78,5 @@
     overflow: hidden;
     text-overflow: ellipsis;
     white-space: nowrap;
+    cursor: default;
 }