Scrolling bookmarks menu whene there is alot of entries. Closes #175

- the same issue was also reported in #159

src/app/proxystyle.cpp

@@ -0,0 +1,15 @@
+#include "proxystyle.h"
+
+ProxyStyle::ProxyStyle()
+    : QProxyStyle()
+{
+}
+
+int ProxyStyle::styleHint(StyleHint hint, const QStyleOption* option, const QWidget* widget, QStyleHintReturn* returnData) const
+{
+    if (hint == QStyle::SH_Menu_Scrollable) {
+        return 1;
+    }
+
+    return QProxyStyle::styleHint(hint, option, widget, returnData);
+}

src/app/proxystyle.h

@@ -0,0 +1,20 @@
+#ifndef PROXYSTYLE_H
+#define PROXYSTYLE_H
+
+#include <QProxyStyle>
+
+class ProxyStyle : public QProxyStyle
+{
+    Q_OBJECT
+public:
+    explicit ProxyStyle();
+
+    int styleHint(StyleHint hint, const QStyleOption* option = 0, const QWidget* widget = 0, QStyleHintReturn* returnData = 0) const;
+
+signals:
+
+public slots:
+
+};
+
+#endif // PROXYSTYLE_H

src/main.cpp

@@ -22,6 +22,7 @@
 
 #include "commandlineoptions.h"
 #include "mainapplication.h"
+#include "proxystyle.h"
 
 int main(int argc, char* argv[])
 {
@@ -52,6 +53,8 @@ int main(int argc, char* argv[])
     }
 
     MainApplication app(cmdActions, argc, argv);
+    app.setStyle(new ProxyStyle());
+
     if (app.isExited()) {
 //        Not showing any output, otherwise XFCE shows "Failed to execute default browser. I/O error" error
 //        if (argc == 1) {

src/src.pro

@@ -184,7 +184,8 @@ SOURCES += main.cpp\
     rss/rssicon.cpp \
     navigation/downicon.cpp \
     network/cabundleupdater.cpp \
-    app/settings.cpp
+    app/settings.cpp \
+    app/proxystyle.cpp
 
 HEADERS  += \
     3rdparty/qtwin.h \
@@ -309,7 +310,8 @@ HEADERS  += \
     rss/rssicon.h \
     navigation/downicon.h \
     network/cabundleupdater.h \
-    app/settings.h
+    app/settings.h \
+    app/proxystyle.h
 
 FORMS    += \
     preferences/autofillmanager.ui \

src/tools/enhancedmenu.cpp

@@ -17,8 +17,6 @@
 * ============================================================ */
 #include "enhancedmenu.h"
 
-#include <QDebug>
-
 Menu::Menu(QWidget* parent)
     : QMenu(parent)
 {

src/tools/enhancedmenu.h

@@ -20,6 +20,7 @@
 
 #include <QMenu>
 #include <QMouseEvent>
+#include <QStyle>
 
 class Action;
 class Menu : public QMenu