don't use combine option on ucs package

Caused problems with unicode.

It seems f9c32fcee337b6560ec31e25fba04cae6021b74a was actually the right fix for the original error, not faf51b858a8c5757944822ee1d75c11367e994f.

closes #5129
Merge pull request #5133 from minrk/latex-unicode-nightmare

Don't use combine option on ucs package

**never** use combine when mixing ascii and non-ascii chars or all the non-ascii chars will be rendered after the ascii one have been.