Workaround for #200: hide start/stop GPS icon from TrackListActivity.

src/main/java/de/dennisguse/opentracks/TrackListActivity.java

@@ -352,7 +352,8 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
         searchMenuItem = menu.findItem(R.id.track_list_search);
         ActivityUtils.configureSearchWidget(this, searchMenuItem, trackController);
 
-        startGpsMenuItem = menu.findItem(R.id.track_list_start_gps);
+        // Workaround for https://github.com/OpenTracksApp/OpenTracks/issues/200
+        //startGpsMenuItem = menu.findItem(R.id.track_list_start_gps);
 
         return super.onCreateOptionsMenu(menu);
     }

src/main/res/menu/track_list.xml

@@ -21,10 +21,12 @@ limitations under the License.
         app:actionViewClass="androidx.appcompat.widget.SearchView"
         app:showAsAction="ifRoom" />
     <!-- Icon and title is overwritten by TrackListActivity -->
+    <!-- Hide icon as workaround for https://github.com/OpenTracksApp/OpenTracks/issues/200 -->
     <item
         android:id="@+id/track_list_start_gps"
         android:icon="@drawable/ic_gps_off_24dp"
         android:title="@string/menu_start_gps"
+        android:visible="false"
         app:showAsAction="ifRoom" />
     <item
         android:id="@+id/track_list_markers"