Plus42 Equations, Preview Release

[Thomas Okken]

New update:

1. Fixed equation editor cursor positioning behavior in 2-line mode (see the posts above).
2. Windows and Linux only: Less aggressive annunciator-off repainting, in order to better support skins that use giant Shift annunciators to change the whole keyboard layout when Shift is pressed. This probably needs more work to make this kind of trick work better with the equation editor, but at least now it is consistent across all versions, and more useful than before.