[CSE] Move code to display minemonic out of the libsync

The libsync should not contain Qt Widget related code.

src/gui/accountmanager.cpp

@@ -23,6 +23,8 @@
 #include <QSettings>
 #include <QDir>
 #include <QNetworkAccessManager>
+#include <QMessageBox>
+#include "clientsideencryption.h"
 
 namespace {
 static const char urlC[] = "url";
@@ -324,10 +326,23 @@ AccountPtr AccountManager::createAccount()
     acc->setSslErrorHandler(new SslDialogErrorHandler);
     connect(acc.data(), &Account::proxyAuthenticationRequired,
         ProxyAuthHandler::instance(), &ProxyAuthHandler::handleProxyAuthenticationRequired);
+
+    connect(acc.data()->e2e(), &ClientSideEncryption::mnemonicGenerated,
+             &AccountManager::displayMnemonic);
+
     return acc;
 }
 
+void AccountManager::displayMnemonic(const QString& mnemonic)
+{
+    QMessageBox msgBox;
+    msgBox.setText(tr("Note your encryption passphrase"));
+    msgBox.setDetailedText(mnemonic);
+    msgBox.setIcon(QMessageBox::Information);
+    msgBox.setStandardButtons(QMessageBox::Ok);
 
+    msgBox.exec();
+}
 void AccountManager::shutdown()
 {
     auto accountsCopy = _accounts;

src/gui/accountmanager.h

@@ -97,6 +97,9 @@ public slots:
     /// Saves account state data, not including the account
     void saveAccountState(AccountState *a);
 
+    /// Display a Box with the mnemonic so the user can copy it to a safe place.
+    static void displayMnemonic(const QString& mnemonic);
+
 
 Q_SIGNALS:
     void accountAdded(AccountState *account);

src/libsync/clientsideencryption.cpp

@@ -27,7 +27,6 @@
 #include <QInputDialog>
 #include <QLineEdit>
 #include <QIODevice>
-#include <QMessageBox>
 
 #include <keychain.h>
 
@@ -931,13 +930,7 @@ void ClientSideEncryption::encryptPrivateKey()
     _mnemonic = list.join(' ');
     qCInfo(lcCse()) << "mnemonic Generated:" << _mnemonic;
 
-    QMessageBox msgBox;
-    msgBox.setText(tr("Note your encryption passphrase"));
-    msgBox.setDetailedText(_mnemonic);
-    msgBox.setIcon(QMessageBox::Information);
-    msgBox.setStandardButtons(QMessageBox::Ok);
-
-    msgBox.exec();
+    emit mnemonicGenerated(_mnemonic);
 
     QString passPhrase = list.join(QString()).toLower();
     qCInfo(lcCse()) << "Passphrase Generated:" << passPhrase;

src/libsync/clientsideencryption.h

@@ -96,6 +96,7 @@ private slots:
 
 signals:
     void initializationFinished();
+    void mnemonicGenerated(const QString& mnemonic);
 
 private:
     void getPrivateKeyFromServer();