[BUGFIX] Resolves editing problem in language mode

* Resolves the problem with many languages
* Set width to min-width to enlarge the viewport

Resolves: #78594
Releases: master, 7.6

Change-Id: I7360f620021d2614800f03da7960bb9acd2360e1
Reviewed-on: https://review.typo3.org/50525


Reviewed-by: Manuel Glauser <mail@manuelglauser.ch>
Tested-by: Manuel Glauser <mail@manuelglauser.ch>
Reviewed-by: Gianluigi Martino <gmartino27@gmail.com>
Tested-by: Gianluigi Martino <gmartino27@gmail.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>