- Fixed mailuser login

This implements ispconfig/ispconfig3#3644

    - make sure umlautdomains can be found in lists.
    - sorting by database name did not work in database quota list.
    - IDN: use standard from 2008 (which also works with "ß").

- Fixed password length in lost password function

- removed most static content from scrigo

- cleaned up some javascript

- Included new icons and buttons
- Layout scaling improved (up to 1260px width)

- Merged language files