Disabled buttons should be identifiable as being "disabled"

refs #7163
Make regular expression pattern in autologin backend being fully optional
Add more detail to error messages when token validation fails

refs #7163
fixes #7410
Add note to login page when the configuration directory is missing

refs #7163
refs #7409
Add more detailed explanations when configuring authentication backends

refs #7163
fixes #7411
Add CLI command to create the configuration directory

It is now not necessary anymore to generate the token as the web server's
user. A user now creates the configuration directory using the CLI as well,
while the SGID is set (in the default mode) causing the token only to be
accessible by the super user who owns the directory/file and the web
server's group.

refs #7163
refs #7408
refs #7410
Don't suppress an E_WARNING in CLI commands

We should probably set an error handler to catch such things in the CLI..
Add a default file mode for new configuration files

The file mode which can be configured in the general configuration is now
used when creating new configuration files with the PreservingIniWriter.