Fixed upper ROM detection that was failing in some cases.

• Fixed model detection.
• Vendor and refresh frequency display.
• RAM detection can distinguish bad RAM from no RAM.
• Detection of Plus ROMs (English, Spanish, and French).

• New main menu and summary screen.
• Checking for 464 vs 664 models.
• Fixed crash on DSK build.

• Improved keyboard layout in keyboard test.
• Support for 464/664, 6128, and matrix keyboard layout (use TAB to cycle through them).
• Tries to autodetects Amstrad model and pick correct keyboard layout automatically.
• Tries to autodetect ROM language and picks Spanish or French keyboard layout if necessary.
• Fix: Upper RAM test doesn't trigger FDC.

• Fix: Upper RAM test on Plus and GX4000 working again.

• Fixed ROM test hanging from upper ROM builds.

• Detecting and testing all upper RAM up to 4MB (it can take a LONG time to test the full 4MB!).
• Esc aborts upper RAM test.
• C3 configuration test uses a pixel not visible on screen.
• Paging out M4 lower ROM to access system ROM.
• No need to press a key after low RAM tests.
• Holding ESC or Fire for 2 seconds exits keyboard test.

• CDT version of the RAM build to load from tape.
• Dandanator lower ROM test fixed.
• Message explaining that lower RAM test was successful.
• Message explaining why sometimes it's we can't do a lower ROM test.

• Added CPC 664 ROM detection.
• Fixed soak test on Dandanator.
• Running the test from ROM as much as possible.
• Showing version in every screen.

Soak test will run low RAM, upper RAM, and ROM tests continuously.
Upper ROM tests will detect all ROMs in the first 15 slots and try to print the name of unknown background ROMs.
Main menu can be navigated with a joystick (or keys). Ideal for whenever you don't have a keyboard connected.