Steps to Reproduce

same examples as ZK-4767 / ZK-4768

move the separator using keyboard

Current Result

some postions produce a large amount of decimal digits in aria-valuenow and aria-valuelabel:

Expected Result

same number formatting as in the collapse="before" case

Debug Information

https://github.com/zkoss/zkcml/commit/bcf8d03d18eca8e33ef6ad7a26235d492cead7ed#diff-dd31c4b79823f5806744fb4e9a4744b6af8a143bebc9234ce5fd39d22b03db8cR82-R84

Line 82 does the number to string formatting .toFixed(2) resulting in a string
the next line then uses this string to subract from 100 resulting again in an unformatted number with eventual (to be expected) floating point errors

there's also a potential DIV/0 error when the whole splitter/splitlayout has a width of 0px resulting in 'NaN'

Workaround