[BUGFIX] Empty subpart template if no data given

substituteMarkerAndSubpartArrayRecursive() should return an empty string
instead of the raw subpart template if no data for that subpart is given.
To clear a subpart the data can be just an empty array.

Change-Id: Ia6dd92168a86058993648c2fe4768b2cc8436cde
Resolves: #47935
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/20702
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
[BUGFIX] Fix double-stdWrapping of GIFBUILDER's TEXT object

During extensive overhaul of stdWrap from TYPO3 v4.4 to v4.5 a
bug was introduced that led to double-stdWrapping of all
properties of GIFBUILDER's TEXT object.

Change-Id: Ib74fdc9899f3d0ee3f6fc96ffbb9c7dbc3ee01e2
Fixes: #41487
Releases: 6.2, 6.1, 6.0, 4.7, 4.5
Reviewed-on: https://review.typo3.org/20530
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters