Graal v4.1 revision 2 released

[Admins]

New Graal versions for Windows and Linux have been released, Mac version will follow next week.

Additions/Fixes:
- the Z emoticon is correctly displayed
- showpoly-lines are shown correctly
- the start-in-fullscreen option is not crashing the game anymore, also switching to fullscreen is working better in general
- GuiBitmapBorderCtrl works always
- basic web-image download has been added, it is not recommended to use it on regular servers though (it's more for developers)
- the true type fonts can be disabled on Linux (and later on Mac) now