Map Confirm Dialogs removed

Jan told me that then deleting a country, we don't delete its actors. I didn't know that, but with that in mind I removed the country-delete confirm dialog.
There is already a confirm and undo step with the 'ok' and 'cancel' buttons and that should be enough.

Changes also include a cancel callback for our dialog_view and the 'add country' input closes now after adding a country (i think its a higher probability that you only add one country at a time versus many)