FindToolBar: Add support for "lightcolored" panels

The labels need to be polished so that they get the right palette,
and the icon needs to be switched from light to dark.

Change-Id: I3e37947e741c3d92f3c1ac3bb02e631aa7803f59
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/projectexplorer/projecttreewidget.cpp

@@ -136,7 +136,8 @@ ProjectTreeWidget::ProjectTreeWidget(QWidget *parent)
 
     QVBoxLayout *layout = new QVBoxLayout();
     layout->addWidget(Core::ItemViewFind::createSearchableWrapper(
-                          m_view, ItemViewFind::FetchMoreWhileSearching));
+                          m_view, ItemViewFind::DarkColored,
+                          ItemViewFind::FetchMoreWhileSearching));
     layout->setContentsMargins(0, 0, 0, 0);
     setLayout(layout);