[BUGFIX] Fix property mapping of checkbox arrays

If multiple checkboxes are rendered but none of it is
selected, an exception is thrown as the value of the hidden field,
that is submitted is a string.

This must be the case because we need to be able to clear out
selected checkboxes and cannot craft a hidden field that will
be translated to a GET/POST arument which is an empty array.

Because of that the ArrayConverter must be able to convert
empty strings to an empty array, just like the "old"
property mapper did.

Change-Id: I115831014caca4868d1f421eb968e01178e1169b
Resolves: #47832
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/21685
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
[BUGFIX] ActionController must use namespaced object view pattern

The ActionController still uses the old pattern like
Tx_@extension_View_@controller_@action@format for resolving
custom view objects. When using a namespaced extension it
must be possible to also use namespaced view objects.
Therefore a new view object pattern has to be introduced:
@vendor\@extension\View\@controller\@action@format

Releases: 6.2, 6.1, 6.0
Resolves: #47609
Change-Id: Iedc6120469f2277b482c5e1c40b89790404e9bbe
Reviewed-on: https://review.typo3.org/21705
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
[BUGFIX] Rootline utility must respect pageOverlayFields

The rootline calculation always overlays all fields
from the pages table. This causes trouble in e.g. the
case that you want to reuse media images from the default
language in other languages. In the previous implementation
(pre 6.x) only the overlay fields from the
 $GLOBALS['TYPO3_CONF_VARS']['FE']['pageOverlayFields']
setting were overlaid.

Fixes: #48224
Releases: 6.2, 6.1, 6.0

Change-Id: I6f5a10150c916df24542ee83e33663a27bdb593f
Reviewed-on: https://review.typo3.org/20796
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
[BUGFIX] Fix localization of the BE user module

Fix some hardcoded labels by replacing them with
f:translate tags.

Change-Id: Ic75f7bd021ff8353b7709906859d2c02eb452b23
Resolves: #49402
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/21670
Reviewed-by: Chris topher
Tested-by: Chris topher
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
[FEATURE] Debug register and page with TypoScript

Adds the possibility to show the content of
$GLOBALS['TSFE']->register and $GLOBALS['TSFE']->page
with the debug option in getText.

Example:
10 = TEXT
10.data = debug:register
20 = TEXT
20.data = debug:page

Resolves: #49478
Releases: 6.2
Change-Id: I79b118fd2450193a6573569f7ec99b8159f973bc
Reviewed-on: https://review.typo3.org/21695
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
[BUGFIX] Wrong placement of image caption in text with image

If you omit the first caption, then the following captions are shifted
into this position, meaning the the captions are off by the number of
empty captions in front.

This happens because the captions are stored with a newline "\n" as
separator which is removed by a trim = 1.

Remove this trim from tt_content.image.20.caption.1.1 as the trimming of
the actual content happens with
tt_content.image.20.caption.1.stdWrap.trim = 1.

The change also has a few cleanups that popped up in PhpStorm while
investigation the issue.

Resolves: #48354
Releases: 6.2, 6.1, 6.0
Change-Id: I4523fa40cbf991b3941d18145a09e72d5e5254d3
Reviewed-on: https://review.typo3.org/20884
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
[TASK] Improve error message in NotFoundView to identify source

The error message before this change would only report the
action name, after this change it will reflect the controller and
extension name as well.

Set to apply to all maintained version since this changes no functions
whatsoever - it only improves error feedback.

Resolves: #49519
Releases: 6.2, 6.1, 6.0, 4.7, 4.5
Change-Id: I61dc32a4542b8664ca9443414278e983bc181c4a
Reviewed-on: https://review.typo3.org/21728
Reviewed-by: Cedric Ziel
Tested-by: Cedric Ziel
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Merge pull request #2 from TYPO3/master

Syncing with upstream master.