Don't hijack "fast" UI refresh w/ the REAGL stuff
Ask for a full refresh when clearing HL

Helps avoiding ghosting, especially on REAGL devices.

re #1119
Make ScrollTextWidget updates regional

Because I like breaking stuff in fun & interesting ways :D
Fix flipping mode refreshes

Don't do regional footer refreshes when we're in flipping mode.
There's probably a more elegant/correct way to handle this, but this
does the job ;).
Fix #1140
Fix partial refreshes on older Kobo devices

Fix #1146 (regression).
Merge pull request #1145 from NiLuJe/master

Some more refresh fixes...