A couple of minor remarkable port fixes (#5834)

* remarkable: remove unnecessary screen invalidate on resume

This is handled in uimanager if needsScreenRefreshAfterResume is enabled
(which is the default).

* remarkable: pass a path argument to reader.lua

Otherwise if lastfile is not set in the settings (e.g. install and then
exit without opening a file) koreader will just refuse to start.

* remarkable: pass koreader.sh args (if any) through to reader.lua

frontend/device/remarkable/device.lua

@@ -87,8 +87,6 @@ function Remarkable:outofScreenSaver()
     if self.screen_saver_mode == true then
         local Screensaver = require("ui/screensaver")
         Screensaver:close()
-        local UIManager = require("ui/uimanager")
-        UIManager:nextTick(function() UIManager:setDirty("all", "full") end)
     end
     self.powerd:afterResume()
     self.screen_saver_mode = false

platform/remarkable/koreader.sh

@@ -118,6 +118,12 @@ if [ -e crash.log ]; then
     mv -f crash.log.new crash.log
 fi
 
+if [ "$#" -eq 0 ]; then
+    args="/home/root"
+else
+    args="$*"
+fi
+
 CRASH_COUNT=0
 CRASH_TS=0
 CRASH_PREV_TS=0
@@ -132,7 +138,7 @@ while [ ${RETURN_VALUE} -ne 0 ]; do
         ko_do_fbdepth
     fi
 
-    ./reader.lua >>crash.log 2>&1
+    ./reader.lua "${args}" >>crash.log 2>&1
     RETURN_VALUE=$?
 
     # Did we crash?