[!!!][BUGFIX] Clear Language Cache Configuration broken

Rename BE user TS option
options.clearCache.clearRTECache
to
options.clearCache.clearLangCache
to determine whether the language cache clear item should be shown.

Fixes: #39103
Releases: 6.1

Change-Id: I701dc9a879de4f3681f3fb441545eaa6b3e08e3e
Reviewed-on: https://review.typo3.org/12912
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
Reviewed-by: Stefan Neufeind
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Raise submodule pointer

Change-Id: I1ceb64d0233c3418adb9ebaf95c94b8062fb3d51
Reviewed-on: https://review.typo3.org/19873
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[BUGFIX] Don't set empty from-name when sending email

If no name is specified, only an email-address, for a sender
avoid setting an empty "from"-parameter.

Change-Id: I4274fd6d227d56d81b42be549e3780a2a29e06cc
Fixes: #44484
Releases: 4.7, 6.0, 6.1
Reviewed-on: https://review.typo3.org/17504
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn