VCS[git]: Make Branchdialog non-modal as is StashDialog.

Give dialogs a consistent look, set
WA_DeleteOnClose on them and improve updating.
Add a Refresh/Diff buttons to branch dialog.

src/plugins/git/branchdialog.h

@@ -52,30 +52,30 @@ class RemoteBranchModel;
  * Branch dialog. Displays a list of local branches at the top and remote
  * branches below. Offers to checkout/delete local branches.
  *
- * TODO: Add new branch (optionally tracking a remote one).
- * How to find out that a local branch is a tracking one?
  */
 class BranchDialog : public QDialog {
     Q_OBJECT
     Q_DISABLE_COPY(BranchDialog)
 public:
     explicit BranchDialog(QWidget *parent = 0);
-
-    bool init(GitClient *client, const QString &workingDirectory, QString *errorMessage);
-
     virtual ~BranchDialog();
 
-protected:
-    virtual void changeEvent(QEvent *e);
+public slots:
+    void refresh(const QString &repository, bool force);
 
 private slots:
     void slotEnableButtons();
     void slotCheckoutSelectedBranch();
     void slotDeleteSelectedBranch();
+    void slotDiffSelected();
+    void slotRefresh();
     void slotLocalBranchActivated();
     void slotRemoteBranchActivated(const QModelIndex &);
     void slotCreateLocalBranch(const QString &branchName);
 
+protected:
+    virtual void changeEvent(QEvent *e);
+
 private:
     bool ask(const QString &title, const QString &what, bool defaultButton);
     void selectLocalBranch(const QString &b);
@@ -83,14 +83,15 @@ private:
     int selectedLocalBranchIndex() const;
     int selectedRemoteBranchIndex() const;
 
-    GitClient *m_client;
     Ui::BranchDialog *m_ui;
     QPushButton *m_checkoutButton;
+    QPushButton *m_diffButton;
+    QPushButton *m_refreshButton;
     QPushButton *m_deleteButton;
 
     LocalBranchModel *m_localModel;
     RemoteBranchModel *m_remoteModel;
-    QString m_repoDirectory;
+    QString m_repository;
 };
 
 } // namespace Internal