Removed inconsistency when user tried to add dive while planning.

The user could add a dive, and in the middle click on the 'plan'
button. Since we didn't cared about that on the widget, a lot of
inconsistencies could occour. this fixes that by setting a flag
on the Planner, that has now three modes: nothing, plan and add.
(maybe in the future an edit mode will be valid too.)

If in 'NOTHING' mode, user can enter the addition, edition and
planning. If in any other mode, user can't do a thing. The mode
gets back to NOTHING when user accepts or cancels a plan / add
/ edition.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/maintab.cpp

@@ -497,6 +497,7 @@ void MainTab::acceptChanges()
 		mainWindow()->showProfile();
 		mainWindow()->refreshDisplay();
 		mark_divelist_changed(TRUE);
+		DivePlannerPointsModel::instance()->setPlanMode(DivePlannerPointsModel::NOTHING);
 	}
 	editMode = NONE;
 
@@ -610,6 +611,7 @@ void MainTab::rejectChanges()
 		updateDiveInfo(selected_dive);
 		mainWindow()->showProfile();
 		mainWindow()->refreshDisplay();
+		DivePlannerPointsModel::instance()->setPlanMode(DivePlannerPointsModel::NOTHING);
 	}
 	editMode = NONE;
 }