moved passphraseCallback and passphraseDialog to startPage

- made some methods of the servercontroller class private
- returned a call to the checkSshConnection() function

client/ui/uilogic.h

@@ -62,7 +62,6 @@ class UiLogic : public QObject
     AUTO_PROPERTY(bool, pageEnabled)
     AUTO_PROPERTY(int, pagesStackDepth)
     AUTO_PROPERTY(int, currentPageValue)
-    AUTO_PROPERTY(QString, privateKeyPassphrase);
 
     READONLY_PROPERTY(QObject *, containersModel)
     READONLY_PROPERTY(QObject *, protocolsModel)
@@ -136,9 +135,6 @@ signals:
     void toggleLogPanel();
     void showWarningMessage(QString message);
 
-    void showPassphraseRequestMessage();
-    void passphraseDialogClosed();
-
 private slots:
     // containers - INOUT arg
     void installServer(QPair<amnezia::DockerContainer, QJsonObject> &container);