This patch replaces the old translation update list in language module
with a lightwight one. It also cleans up the way to resolve the
translations and optimizes the interaction to the language selection
list.

Change-Id: Ifd4d8ca8c849def0bc868473ea15bc5fccdf757b
Resolves: #40833
Related: #39963
Releases: 6.0
Reviewed-on: http://review.typo3.org/14683
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer