CD-ROM images are now working correctly again;

Fixed all the reported bugs regarding the Settings dialog;
MIDI out device is now no longer reset to 0 after hard reset;
Removed all vestiges of the old disk activity flash;
The configuration file is no longer saved when it shouldn't be;
Redone the status bar icon updating so it is only done in win.c;
Made sure all variables in ibm.h are extern;
A lot of other bugfixes;
Added Mouse Systems Mouse emulation (patch from TheCollector1995);
Added IBM PS/1 Model 2133 (486) emulation (patch from TheCollector1995);
Tweaked the CPU dynamic recompiler cycle periods - 486SX 33 and 486DX 33 now work;
Increased compatibility with configuration files from before the previous commit.

src/mouse.c

@@ -14,8 +14,8 @@ static mouse_t *mouse_list[] = {
     &mouse_bus,			/* 3 Logitech Bus Mouse 2-button */
     &mouse_amstrad,		/* 4 Amstrad PC System Mouse */
     &mouse_olim24,		/* 5 Olivetti M24 System Mouse */
-#if 0
     &mouse_msystems,		/* 6 Mouse Systems */
+#if 0
     &mouse_genius,		/* 7 Genius Bus Mouse */
 #endif
     NULL