+ add ja to available langs

+ add signals to lineEdits
* rewrite errorwindow class to static methods
* replace mask in ip lineedits to validators (fix #34)
* fix advanced lines
* move AdHoc and Hidden options to advanced (#28)
* fix default wpa_supplicant conf path (#28)
* update toolbars to #2
* replace General settings section to Common (see http://doc.qt.io/qt-5/qsettings.html#Format-enum)

sources/gui/src/tunnelwidget.h

@@ -43,7 +43,6 @@ public slots:
 private:
     Ui::TunnelWidget *ui;
     void createFilter();
-    QString getIp(const QString rawIp);
 };