Code maintenance for Qt 5:

- Added usage of QUrlQuery
- Removed QSound::isAvailable()
- Changed Qt::escape() to QString::toHtmlEscaped()
- Changed QAbstractItemModel::setSupportedDragActions() to virtual QAbstractItemModel::supportedDragActions()

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@6851 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/retroshare-gui.pro

@@ -176,7 +176,7 @@ win32 {
 	# create lib directory
 	QMAKE_PRE_LINK = $(CHK_DIR_EXISTS) lib $(MKDIR) lib
 
-	DEFINES += WINDOWS_SYS
+	DEFINES *= WINDOWS_SYS WIN32_LEAN_AND_MEAN _USE_32BIT_TIME_T
 
 	INCLUDEPATH += .
 }