- luainstance: switch to lua_Integer/lua_Unsigned
- movieplayer: add playlist_manager

NOTE: This is a merge of several patches by TangoCash
      for neutrino-mp aligned to neutrino-hd.
      We use 'play' key to open playlist_manager.
- movieplayer: disable clock and mute while playlist_manager
Merge remote-tracking branch 'cool-cst-next/cst-next'

Conflicts:
	src/gui/luainstance.cpp