Git: Allow creating a new repository from branch view

... when clicking "Add Branch" in a project that is not
under git version control.

The "Add Branch" serves no purpose here, so re-use it
to call this (already existing) function.

Done-with: Orgad Shaneh <orgad.shaneh@audiocodes.com>
Change-Id: Ib23d2cbeec0598e0b6f00cbde265793cc25e6142
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitplugin.h

@@ -93,6 +93,7 @@ public:
     QObject *remoteCommand(const QStringList &options, const QString &workingDirectory,
                            const QStringList &args) override;
     void manageRemotes();
+    void initRepository();
 
 protected:
     void updateActions(VcsBase::VcsBasePlugin::ActionState) override;