[PB] Fix WAIT_FOR_UPDATE_COMPLETE ioctl (#6669)

* Fix WAIT_FOR_COMPLETE ioctl (fix #6000)

* Prevent a promotion to a flashing on fg/bg toggle

* Bump base for the matching PB updates

(https://github.com/koreader/koreader-base/pull/1188)

base

@@ -1 +1 @@
-Subproject commit 50a965c28fd5ea2100257aa9ce2e62c9c301155c
+Subproject commit 7c380d0590ce51795513c3fc12bc6f36a2d9a131

frontend/device/pocketbook/device.lua

@@ -36,13 +36,15 @@ local PocketBook = Generic:new{
 
     -- all devices that have warmth lights use inkview api
     hasNaturalLightApi = yes,
+
+    -- Apparently, HW inversion is a pipedream on PB (#6669)
+    canHWInvert = no,
 }
 
 -- Make sure the C BB cannot be used on devices with a 24bpp fb
 function PocketBook:blacklistCBB()
     -- As well as on those than can't do HW inversion, as otherwise NightMode would be ineffective.
-    --- @fixme Either relax the HWInvert check, or actually enable HWInvert on PB if it's safe and it works,
-    --        as, currently, no PB device is marked as canHWInvert, so, the C BB is essentially *always* blacklisted.
+    --- @note: Since HWInvert is a no-go on PB, the C BB is essentially *always* blacklisted.
     if not self:canUseCBB() or not self:canHWInvert() then
         logger.info("Blacklisting the C BB on this device")
         if ffi.os == "Windows" then
@@ -104,7 +106,7 @@ function PocketBook:init()
                 end
             elseif ev.code == C.EVT_FOREGROUND or ev.code == C.EVT_SHOW then
                 tryOpenBook()
-                ui:setDirty('all', 'partial')
+                ui:setDirty('all', 'ui')
                 if quasiSuspended then
                     quasiSuspended = false
                     return "Resume"