New: Added option in xCodeCapp for displaying error in notification

Previously it wasn't possible to configure xCodeCapp to show or not errors/warnings and capp_lint with notifications
FIXED: XCC Preferences Coherency

This patch fixes various UX weirdness with preferences and makes everything aligned.
New: open reporting window when clickin on a notification in xCodeCapp
Fixed: delegate of the notificationCenter is in AppController
Fixed: check the entire project with capp_lint doesn't open the reporting window or a notification
Fixed: capp_lint in xCodeCapp doesn't care about xcodecapp-ignore
Fixed: tableView doens't update its content with capp_lint
Merge pull request #2108 from Dogild/xCodeCappOptionsNotification

New: Added option in xCodeCapp for displaying error in notification