PB: Handle KEY_HOME

It possibly historically never made it out of InkView in the past, but
apparently that's no longer the case and/or every other key behaves the
same way anyway, so it's harmless at worst.

Fix #9791

frontend/device/pocketbook/device.lua

@@ -192,6 +192,7 @@ function PocketBook:init()
         device = self,
         raw_input = raw_input,
         event_map = setmetatable({
+            [C.KEY_HOME] = "Home",
             [C.KEY_MENU] = "Menu",
             [C.KEY_PREV] = "LPgBack",
             [C.KEY_NEXT] = "LPgFwd",