* kernel: Make sf9 return TSTATE_FREE for invalid slots: 0, >255, free.
* menu: Ignore free slots even if other fields of proc_info look valid.
Documentation (sysfuncs.txt) clearly states all the other info
as invalid when slot_state is TSTATE_FREE.
* taskbar: Same as menu.
* cmm/lib/*: Same as menu.
* programs/macros.inc: Add TSTATE_* macros.
- remove outdated unused code
- use built-in font instead of a file in /fonts/ folder
git-svn-id: svn://kolibrios.org@7433 a494cfbc-eb01-0410-851d-a64ba20cac60