Admin allows exiting an edit screen without saving changes or asking if the user wants to exit without saving

[mvinent]

Describe the bug
When editing elements (layers, users, services, etc) or creating a new ones it is possible to exit the screen without asking for validation.

To Reproduce
Steps to reproduce the behavior:

1. Go to any editing screen
2. Click on add or edit some fields
3. Go to another menú
4. See how any data added or edited is lost

Expected behavior
It should ask before exiting and losing all the data added, we could make a popup asking for confirmation.