froxlor.css: fixed dashboard - corners

Signed-off-by: Florian Aders (EleRas) <eleras@froxlor.org>
froxlor.css: fixed corners of add/edit forms

Signed-off-by: Florian Aders (EleRas) <eleras@froxlor.org>
froxlor.css: fixed formatting of formfields

Signed-off-by: Florian Aders (EleRas) <eleras@froxlor.org>