Add example to the secondary role tooltip.

Author: mondalaci

packages/uhk-web/src/app/components/popover/tab/keypress/keypress-tab.component.html

@@ -49,7 +49,15 @@
     ></select2>
     <icon name="question-circle"
           data-toggle="tooltip"
-          title="The secondary role activates when another key gets pressed while holding this key."
+          html="true"
+          maxWidth="620"
+          title="<p class='text-left'>The secondary role activates when another key gets pressed while holding this key.</p>
+                 <p class='text-left'>Let's say that the scancode is Escape and the secondary role is Mouse. Then:</p>
+                 <ul class='text-left'>
+                     <li>Tap this key to trigger Escape. <i>(Primary role)</i></li>
+                     <li>Hold this key and press another key to activate the relevant key of the Mouse layer. <i>(Secondary role)</i></li>
+                 </ul>
+                 <p class='text-left pt-3'>The secondary role can be any layer or modifier.</p>"
           data-placement="bottom"></icon>
 </div>