exclude 'ANGEBOT DES TAGES' (i.e. daily deal) from Tages-protected games

As all Summer Sale daily deals have "ANGEBOT DES TAGES" on them, this patch aims to skip those.

I'm not entirely sure the current approach is good in the long run, as TAGES-protected games could pop up in the long run - so eventually, either not enough or too many games could be marked incorrectly.