added field containing application platform to backup file, added feature to clear appsSplitTunneling list from backup file if backup was made on other platform

client/ui/models/appSplitTunnelingModel.h

@@ -29,6 +29,7 @@ public:
 public slots:
     bool addApp(const InstalledAppInfo &appInfo);
     void removeApp(QModelIndex index);
+    void clearAppsList();
 
     int getRouteMode();
     void setRouteMode(int routeMode);