Multiple subwindows interface

Subwindows are similar to tab groups.
- Rewrote Browser and MainWindow, so they should be somewhat cleaner now
- Moved AboutDialog to lib/about

What's broken:
- loading bar
- search box
- address bar bookmark suggestions
- plugins

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/downloads/downloadswidget.h b/lib/downloads/downloadswidget.h
index 3d5fcb8..f7c25bb 100644
--- a/lib/downloads/downloadswidget.h
+++ b/lib/downloads/downloadswidget.h
@@ -10,13 +10,13 @@
 #define SMOLBOTE_DOWNLOADDIALOG_H
 
 #include <QDialog>
+#include <QWebEngineDownloadItem>
 
 namespace Ui
 {
 class DownloadDialog;
 }
 
-class QWebEngineDownloadItem;
 class DownloadsWidget : public QDialog
 {
     Q_OBJECT