Spelling errors in stylesheet_zcustom.css.

Recently found two spelling errors in stylesheet_zcustom.css. These have been fixed in the github repository for the mod.

To manually change errors, lines 36 and 40 (of the original version) need to bed changed from
Code:
.button-top{nargin-top:1px;}
to
Code:
.button-top{margin-top:1px;}