Enhancement: Allow banned users to log in and delete their posts and comments

[happy-river]

If a user is site-banned, they currently cannot log in. In order for a Throat site to be GPDR compliant, users need to have the ability to delete their personal information. To accomplish that, we should allow site-banned users access to the views that enable them to delete content they created from the site, but not to add any new content.

[happy-river]

I'm working on this one and here is the list of views I propose allowing site-banned users to access:

home.view_user_uploads
user.edit_user
user.edit_account
user.delete_account
messages.inbox_sort
messages.view_notifications
messages.delete_notification
messages.view_messages
messages.view_saved_messages
do.logout
do.edit_account
do.delete_user
do.edit_user
do.delete_post
do.read_pm
do.readall_msgs
do.delete_pm
do.delete_comment