activate zbuffer updates for alpha ramps again

git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@578 14438d79-0ffd-4333-8ae7-ea2bdd901387
'fix' bug from 494 and revert fuzzels temporary workaround

..might have sideeffects on ball updates/blits, but i didn't find any so far

git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@579 14438d79-0ffd-4333-8ae7-ea2bdd901387
d'oh.. don't change stuff -after- testing..

git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@580 14438d79-0ffd-4333-8ae7-ea2bdd901387
tiny optimization

git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@581 14438d79-0ffd-4333-8ae7-ea2bdd901387
-really- fix the strange outlines on ball updates with flashers

git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@582 14438d79-0ffd-4333-8ae7-ea2bdd901387
add hide/unhide all option for all elements inside the editor. this makes it more user friendly to access elements which are organized in layers

git-svn-id: svn://svn.code.sf.net/p/vpinball/code/trunk@583 14438d79-0ffd-4333-8ae7-ea2bdd901387