A full (non-partial) refresh on every screen change (638eea7b) turned out to be
far too aggressive on real e-ink hardware: every navigation black-flashes,
which is worse than the ghosting it was clearing. Remove the whole mechanism —
DisplayDriver::forceFullRefresh() virtual, GxEPDDisplay's _force_full flag and
override, the endFrame() branch, and the setCurrScreen() call. E-ink is back to
interval-only full refreshes (Settings > Full refresh interval).
The favourites "(gone)"-tile prune that shipped in the same commit is kept.
Builds green: WioTrackerL1Eink_companion_solo_dual.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>