package_daemon: fix regressions from Set*UIColor merge.

Also use Set*UIColor where appropriate.

package daemon: Implement dependency resolution support

... for package changes performed manually by the user (i.e.
adding/removing files in a packages directory). Currently only done for
the system root. Alternative roots should still work as before, so this
shouldn't affect haikuporter (not tested yet).

Needs some more work (e.g. the GUI part).

package daemon: Implement dependency resolution support

... for package changes performed manually by the user (i.e.
adding/removing files in a packages directory). Currently only done for
the system root. Alternative roots should still work as before, so this
shouldn't affect haikuporter (not tested yet).

Needs some more work (e.g. the GUI part).