Fix search in places panel.

addType("File") will create a invalid query for baloo. Currently seems
there is no replacement for it, so just remove it.

REVIEW: 126109
FIXED-IN: 15.12
BUG: 348902

src/panels/places/placesitemmodel.cpp

@@ -1161,7 +1161,6 @@ QUrl PlacesItemModel::createSearchUrl(const QUrl& url)
 QUrl PlacesItemModel::searchUrlForType(const QString& type)
 {
     Baloo::Query query;
-    query.addType("File");
     query.addType(type);
 
     return query.toSearchUrl();