[580] [581] [603] fixes, new sprites and a theme visual flag
- Fix bug 603 add 3 missing low res sprites to Morris4 disc set
- Add 2 missing sprites to the Morris4 disc set
- Fix bug 581 RMA leak on RISC OS 3.10 when doing *IconSprites
- Fix bug 580 plotting RISC OS 3.10 ROM sprites as opaque
- New *WimpVisualFlag to allow the icon bar border to be turned off for themes that would benefit from that
- Add application sprites for !Choices so it doesn't get a default one when relocated out of !Boot
Edited by Robert Sprowson
