[TYPO3-l10nmgr] Better support for TemplaVoila

[Felix Nagel]

Currently l10nmgr needs custom FCE in TV to use langChildren. When 
enabled, every translation is shown beneath the original field(s).

This leads to a bunch of shown fields. Thats why we're using langDisable 
within our FCEs which currently breaks l10nmgr. Why does this (afaik) 
only visual changing in TV backend breaks l10nmgr?

Is there any workarround or alternative to the unpleasant langChildren 
mode? Is there a best practice?

Thanks in advance,
-- 
Regards
Felix Nagel