Beta 4:

- A600/A1200/A4000 IDE emulation 4G wrap around bug fixed
- "Add PC drives at startup" drive device name creation tries to detect already mounted device names, prevents ugly looking ´DHx_0´-style names. (note that this only affects name generation of "Add PC drives at startup"-drives)
- renamed GUI "autoboot" -> "bootable"
- rom scan duplicate path detection improved