Force focus on password field, resolves #116 (#117)

Also remove redudant code for minimizing to tray

src/gui/DatabaseOpenWidget.cpp

@@ -58,6 +58,12 @@ DatabaseOpenWidget::~DatabaseOpenWidget()
 {
 }
 
+void DatabaseOpenWidget::showEvent(QShowEvent* event)
+{
+    DialogyWidget::showEvent(event);
+    m_ui->editPassword->setFocus();
+}
+
 void DatabaseOpenWidget::load(const QString& filename)
 {
     m_filename = filename;

src/gui/DatabaseOpenWidget.h

@@ -45,6 +45,7 @@ Q_SIGNALS:
     void editFinished(bool accepted);
 
 protected:
+    void showEvent(QShowEvent* event) override;
     CompositeKey databaseKey();
 
 protected Q_SLOTS:

src/gui/MainWindow.cpp

@@ -333,15 +333,6 @@ void MainWindow::openDatabase(const QString& fileName, const QString& pw, const
     m_ui->tabWidget->openDatabase(fileName, pw, keyFile);
 }
 
-void MainWindow::minimizeWindow()
-{
-    if (isTrayIconEnabled() && config()->get("GUI/MinimizeToTray").toBool()) {
-        hide();
-    } else {
-        setWindowState(Qt::WindowMinimized);
-    }
-}
-
 void MainWindow::setMenuActionState(DatabaseWidget::Mode mode)
 {
     int currentIndex = m_ui->stackedWidget->currentIndex();

src/gui/MainWindow.h

@@ -38,7 +38,6 @@ class MainWindow : public QMainWindow
 public:
     MainWindow();
     ~MainWindow();
-    void minimizeWindow();
 
 public Q_SLOTS:
     void openDatabase(const QString& fileName, const QString& pw = QString(),