Beta 4:

- removable real harddrives (or other memory devices) work again (broke in b2)
- OCS/ECS "7-planes" mode didn´t enable EHB mode
- 320x256, 640x512, 800x600, 1024x768 and 1280x1024 are always available in Picasso96 resolution selection, even if host does not support the mode (in fullscreen mode automatically selects next higher available mode + black borders) 320x200 and 320x240 was already "faked" previously
- ECS Agnus 0.5M+0.5M "1M chip" mirror works again (Move Any Mountain)
- copper disassembler uses Agnus bank instead of direct memory access, works now with above configuration
- blitter writes work to "chip mirror" (Move Any Mountain missing gfx)
- mouse counter emulation rewrite, now works with programs that read counters hundreds of times/frame. (Oil Imperium pipelining minigame, some weird lag can be noticed but it is much better than previously)
- added support for 81 and 82 cylinder PC/Atari ST image formats
- memwatch breakpoints work after reset/memory bank changes