Enable editing a dive that was manually entered.

This patch enables editing a dive that was manually entered,
it doesn't cover dive plans yet because on the plan I need to
figure out what are the 'user-entered' points, and what are
the algorithm point. and I feel lazy. =p

One last thing that's missing is to revert the dive to the
previous condition if the user cancels the edition, currently
canceling and applying ok is the same thing.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

qt-ui/mainwindow.h

@@ -109,6 +109,7 @@ public slots:
 	void readSettings();
 	void refreshDisplay();
 	void showProfile();
+	void editCurrentDive();
 
 private:
 	Ui::MainWindow ui;