CSS system.css width of fields too small

In file system.css I suggest making some widths a bit larger, so that the German (and maybe other) translations don't break the layout:

diff system.css-old system.css-new
189c189
<   width: 20em;
---
>   width: 14em;
192c192
<   width: 15em;
---
>   width: 8em;

This leads to:

dl.multiselect dd.b, dl.multiselect dd.b .form-item, dl.multiselect dd.b select {
  font-family: inherit;
  font-size: inherit;
  width: 20em;
}
dl.multiselect dd.a, dl.multiselect dd.a .form-item {
  width: 15em;