- preset chooser doesn't abort when preset dir is invalid
- added smooth preset switch cancellation when preset chooser empty (untested)
- changed preset construct to allow for custom preset name when using
input streams as source
git-svn-id: https://projectm.svn.sourceforge.net/svnroot/projectm/trunk@427 6778bc44-b910-0410-a7a0-be141de4315d