MONKEY-SEGA: scrolling should be smooth (also a special cursor while loading data)

[ATMcashpoint]

On a SegaCD emulator, Monkey Island 1 for Sega CD (in English) has smooth, pixel-by-pixel scrolling, rather than the 8-pixels-at-a-time columnar scrolling that SCUMM used from Maniac Mansion until the mid-1990s. However, this isn't reproduced in ScummVM (as of the February 20, 2020 daily build for 64-bit Windows).

Also, the MI1 SegaCD port features a special "wait" cursor while the game is loading data, a watch with a spinning minute hand, which might be desirable to emulate in ScummVM. (It's especially visible during transitions from one screen to anther.)

Oddly enough, both pixel-by-pixel scrolling and special cursors during screen transitions are features that show up also in The DIG.