add FindSettings key

sources/gui/docs/netctl-gui-dbus-api.html

@@ -71,6 +71,11 @@ th.sub {
     <td><code>true</code> and closes the helper</td>
     <td>no</td>
   </tr>
+  <tr>
+    <td>QStringList FindSettings()</td>
+    <td>scans system and suggests the recommended configuration which will be used by the library</td>
+    <td>no</td>
+  </tr>
   <tr>
     <td>QString LibraryDocs()</td>
     <td>returns path to the library documentation</td>