+ 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/mainwindow.h

@@ -30,7 +30,6 @@
 
 class AboutWindow;
 class BridgeWidget;
-class ErrorWindow;
 class EthernetWidget;
 class GeneralWidget;
 class IpWidget;
@@ -109,7 +108,6 @@ private slots:
     void updateMenuMain();
     void updateMenuProfile();
     void updateMenuWifi();
-    void updateToolBars();
     // tab update slots
     void updateMainTab();
     void updateProfileTab();
@@ -138,15 +136,11 @@ private slots:
 private:
     // ui
     TrayIcon *trayIcon = nullptr;
-    QMap<QString, QShortcut *> appShortcuts;
     QMap<QString, QAction *> toolBarActions;
     QToolButton *actionMenu = nullptr;
     QToolBar *actionToolBar = nullptr;
-    QToolBar *helpToolBar = nullptr;
-    QToolBar *mainToolBar = nullptr;
     Ui::MainWindow *ui = nullptr;
     AboutWindow *aboutWin = nullptr;
-    ErrorWindow *errorWin = nullptr;
     NetctlAutoWindow *netctlAutoWin = nullptr;
     PasswdWidget *passwdWid = nullptr;
     SettingsWindow *settingsWin = nullptr;