gui: Use handshake icon for "Introduced by" (fixes #5560) (#5561)

gui/default/index.html

@@ -740,7 +740,7 @@
                       <td translate class="text-right">Yes</td>
                     </tr>
                     <tr ng-if="deviceCfg.introducedBy">
-                      <th><span class="far fa-fw fa-meh"></span>&nbsp;<span translate>Introduced By</span></th>
+                      <th><span class="far fa-fw fa-handshake-o"></span>&nbsp;<span translate>Introduced By</span></th>
                       <td class="text-right">{{ deviceName(findDevice(deviceCfg.introducedBy)) || deviceCfg.introducedBy.substring(0, 5) }}</td>
                     </tr>
                     <tr ng-if="connections[deviceCfg.deviceID].clientVersion">