Use DisableShortcutsOnFocusGainedTextField instead of JTextField insi…

…de the filter panel

Now when you enter characters into the field for filtering by user, the keystrokes are no longer treated as keyboard shortcuts while the text field has focus.
Fixes #35.

src/org/openstreetmap/josm/plugins/mapillary/gui/MapillaryFilterDialog.java

@@ -27,6 +27,7 @@
 import org.openstreetmap.josm.Main;
 import org.openstreetmap.josm.gui.SideButton;
 import org.openstreetmap.josm.gui.dialogs.ToggleDialog;
+import org.openstreetmap.josm.gui.widgets.DisableShortcutsOnFocusGainedTextField;
 import org.openstreetmap.josm.plugins.mapillary.MapillaryAbstractImage;
 import org.openstreetmap.josm.plugins.mapillary.MapillaryDataListener;
 import org.openstreetmap.josm.plugins.mapillary.MapillaryImage;
@@ -110,7 +111,7 @@ private MapillaryFilterDialog() {
 
     JPanel userSearchPanel = new JPanel();
     userSearchPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
-    this.user = new JTextField(10);
+    this.user = new DisableShortcutsOnFocusGainedTextField(10);
     this.user.addActionListener(new UpdateAction());
     userSearchPanel.add(new JLabel(tr("User")));
     userSearchPanel.add(this.user);