PageTSconfig was only included in Typical and Advanced
mode resulting in an exception when adding images in
the RTE with Demo mode enabled (via Extension Manager).

Resolves: #74314
Releases: master, 7.6
Change-Id: Ieaffc7faa5cca1f910d1b00fd87e4ae4585889d6
Reviewed-on: https://review.typo3.org/47092


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Eugen Lang <laeu1011+gerrit@gmail.com>
Tested-by: Eugen Lang <laeu1011+gerrit@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>