[BUGFIX] Bad English in TCEforms: "Edit Pagecontent" and "fontface"

Core language files contain the words "Pagecontent" and "fontface",
which both must be two separate words.

Change-Id: I5538002e38a8a07224299c151bf7bbe525883754
Resolves: #22913
Releases: 6.2, 6.1
Reviewed-on: https://review.typo3.org/21295
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters