fix https://github.com/nens/lizard-nxt/issues/475
fix bug with horizontal stack chart interfering with other graphs
use height for clippath identification to fix bug with landuse overwriting elevation clippath
Merge branch 'integration' of github.com:nens/lizard-client into Ernst_fix_bugs
add changes also for previous issues
Merge pull request #208 from nens/Ernst_fix_bugs

DONE: Ernst fix bugs