Allow regular users to specify global credentials password

add events to check passwords with the password policy app

Add "Login credentials" and "User Provided"

Quickfix: do not lazy load auth mechanisms for ext storages

Prerender file list pages to include search results

show which login name to use for the new app password

While the UI is existent the feature simply doesn't work because admin privileges are required for the controller. This adds proper permission checks and also unit tests.

To test this:
1. Enable external storage
2. Login as non-admin user
3. Go to personal page and try to change global credentials

Keep encryption enabled if decrypting for single user

Add explicit delete permission to link shares

Make code integrity check work when OC is not installed yet

Some auth mechanisms like SessionCredentials need to register hooks
early, so they cannot be lazy loaded.

Remove tooltip when disconnecting token

Remove ie8+9 support

Remove a fed share from the local table before trying to notify the remote server

Use OC.Backbone instead of Backbone directly in authtoken JS code

check login name when authenticating via token and basic auth

[Master] upstream sync

Makes select2 in settings/admin look the same like everywhere else

Fix search result link for file results outside default list

Show error message when posting an invalid comment

When decrypting all files of a single user, the admin usually does not
intend encryption to be suddenly disabled for everyone. This fix
reenables encryption after decrypting for a single user.

Decrypting for all users will still disable encryption globally.

When filtering the file list, if a result is on an unrendered page,
make sure to call _nextPage() to prerender the pages in order to
display all matching results.

Replace occurence of "ownCloud" by "Nextcloud"

When clicking on a folder result in the search result list, the result
box for "results in another folder" must disappear.

When outside the "All files" list, the search result link must properly
redirect to the "All files" list.

Add option to `occ files_external:list` to show all configured mounts

When an internal server error occurs while creating or updating a
comment, display a proper error notification in the UI.