Fix missing includes

src/collection/collectionfilterwidget.cpp

@@ -42,7 +42,7 @@
 #include <QMenu>
 #include <QSettings>
 #include <QToolButton>
-#include <QtEvents>
+#include <QKeyEvent>
 
 #include "core/iconloader.h"
 #include "core/song.h"

src/collection/collectionview.h

@@ -39,6 +39,7 @@ class QAction;
 class QContextMenuEvent;
 class QMouseEvent;
 class QPaintEvent;
+class QKeyEvent;
 
 class Application;
 class CollectionFilterWidget;

src/collection/collectionviewcontainer.cpp

@@ -21,6 +21,8 @@
 
 #include "config.h"
 
+#include <QKeyEvent>
+
 #include "collectionfilterwidget.h"
 #include "collectionview.h"
 #include "collectionviewcontainer.h"