Git BranchAddDialog: small fixes

Change-Id: I99910fdb3a646ad818ad58103beb5f63de57ec18
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/git/branchadddialog.cpp

@@ -64,8 +64,6 @@ public:
     {
     }
 
-    ~BranchNameValidator() {}
-
     State validate(QString &input, int &pos) const override
     {
         Q_UNUSED(pos)
@@ -141,7 +139,7 @@ void BranchAddDialog::setTrackedBranchName(const QString &name, bool remote)
     }
 }
 
-bool BranchAddDialog::track()
+bool BranchAddDialog::track() const
 {
     return m_ui->trackingCheckBox->isChecked();
 }

src/plugins/git/branchadddialog.h

@@ -46,7 +46,7 @@ public:
 
     void setTrackedBranchName(const QString &name, bool remote);
 
-    bool track();
+    bool track() const;
 
 private:
     void updateButtonStatus();