luci-theme-openwrt: work around cssmin bug breaking the minified CSS.

The cssmin utility incorrectly breaks up calc() expressions when
minifying rules. Avoid the problem by trimming uneeded spaces.

Fixes: #3801
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Jo-Philipp Wich 2020-03-31 15:25:27 +02:00
parent 14c59e09be
commit 63057a08dc