Labels for 2FA choices
Currently, the 2F choice display only contains logo, which can be confusing for users.
Furthermore, 2F modules are inconsistent in the way they hand logos: some modules let you change it through a parameter, some modules require that you overwrite the image file.
In the attached MR, I add a logo and a label parameter to all 2F modules.
A descriptive text is now displayed above EVERY 2F choice:
If a Label has been configured for a particular 2F provider, it is displayed regardless of language. If no label is set, the internationalization system is used to display a default description. The admin can of course override this label too in lemonldap-ng.ini
The "Additional second factors" feature now lets you override the logo and label as well: