Further project file clean up

configure

@@ -534,7 +534,7 @@ public:
 		QString version, libs, other;
 		VersionMode mode = VersionMin;
 		if(conf->findPkgConfig("libnotify", mode, req_ver, &version, &incs, &libs, &other)) {
-			conf->addDefine("WITH_LIBNOTIFY");
+			conf->addExtra("CONFIG += libnotify");
 			for(int n = 0; n < incs.count(); ++n)
 				conf->addIncludePath(incs[n]);
 			if(!libs.isEmpty())

qcm/libnotify.qcm

@@ -24,7 +24,7 @@ public:
 		QString version, libs, other;
 		VersionMode mode = VersionMin;
 		if(conf->findPkgConfig("libnotify", mode, req_ver, &version, &incs, &libs, &other)) {
-			conf->addDefine("WITH_LIBNOTIFY");
+			conf->addExtra("CONFIG += libnotify");
 			for(int n = 0; n < incs.count(); ++n)
 				conf->addIncludePath(incs[n]);
 			if(!libs.isEmpty())

unixconf.pri

@@ -4,6 +4,10 @@ QMAKE_LFLAGS_APP += -rdynamic
 CONFIG += link_pkgconfig
 PKGCONFIG += libtorrent-rasterbar
 
+libnotify {
+  DEFINES += WITH_LIBNOTIFY
+}
+
 # Man page
 nox {
     man.files = ../doc/qbittorrent-nox.1