Modal instead of confirm() when deleting

[Albert221]

I think that modal from Bootstrap would be a better idea than using confirm(), because confirm() stays out of Codice design and it might be confusing when you will want to delete a note and then magical browser-alert-style box appears. Modal will be a better idea in terms of UX because of that and in terms of design. Don't forget that focus should be on "Delete" by default when modal will appear for better user experience.