Fixes#12723
## Problem
With two or more state groups, a falsy state entry would run
`dom.style.cssText = ''`, wiping all inline styles - including valid
styles just set by earlier groups. This caused earlier groups to lack
css styling.
## Solution
**1. Collect first, apply once**
During the stateMap.forEach loop, gather each active group's styles into
a shared `mergedStyles` object.
Inactive groups still clear their own `data-*` attribute but leave
styles untouched.
**2. Single reset + single write**
After the loop, perform one cssText reset, instead of one cssText in
each iteration. Then apply each state group's css all at once, after the
blank reset
Result: every state group can coexist without overwriting styles from
the others
3d177fd935