Fixed #4425 Variable is initialized as string but later written to as array, throws fatal error in PHP 7.1

Fixed #4444 Error in the template htm /usr/local/ispconfig/interface/web/client/templates/reseller_edit_limits.htm

Fixed #4443 Error in the template htm /usr/local/ispconfig/interface/web/client/templates/client_edit_limits.htm

Fixed #4440 Error in the template htm /usr/local/ispconfig/interface/web/client/templates/client_template_edit_limits.htm

fixed issue with missing bracket

I just realised that in my last patch a bracket was missing.
Sorry for that - here's the fix for it.

See merge request !512

small typo in french translation



See merge request !511