Delete task/project confirmation

[Bezifabr]

IMO deleting tasks/projects without double confirmation can lead to accidentally removed lists.

Please implement a dialog asking if the user really wants to delete stuff.

example:

1. User press a button to delete a project
2. Terminal displays a dialog:

---

| Do you want to delete the project? |
| |
| Yes No |

If user press 'yes' then it's deleted
If user press 'no' then nothing happens

[Robert-M-Muench]

Yes, just hit D accidentally... no fun... really not.