[BUGFIX] Show correct tooltip for page type "Mount Point"

The tooltip of pages of the type "Mount Point" lacks the information
about the linked page because the needed fields are not retrieved.

Additionally the shortcut tooltip gets improved for the page tree.

Change-Id: I9c7c65094d23bbc0b0eb6100b0d6a62641c00d22
Resolves: #61951
Related: #60033
Releases: master, 6.2
Reviewed-on: http://review.typo3.org/33180
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
[TASK] Deprecate unused/non-unified DocumentTemplate code

There are certain parts in DocumentTemplate - one of the main rendering
classes for the Backend - that are not in use anymore or can be
accessed via the pageRenderer, which DocTemplate uses under the hood.

Additionally, certain options, like rendering XHTML or HTML3 in
the backend, are not needed anymore, as the whole code is targeted
to be HTML5 compatible.

The variables

* $inDocStyles
* $inDocStyles_TBEstyle

are unified within the main inDocStylesArray.

JScodeLibArray is not in use anymore and deprecated as well.
The method menuTable is not used anymore and also deprecated.

Releases: master
Resolves: #62038
Change-Id: I136fbd4e58b63d44d048e1b355413bff044be771
Reviewed-on: http://review.typo3.org/33167
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
[BUGFIX] RTE Language extension refers to non-existent method

RTE Language extension refers to non-existent method
tx_staticinfotables_div::getCurrentLanguage in Static Info Tables.

Releases: master, 6.2
Resolves: #62111
Change-Id: I9a37a40da367f47da9ee3a015537e79d3ff5a88a
Reviewed-on: http://review.typo3.org/33210
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Stanislas Rolland <typo3@sjbr.ca>
Tested-by: Stanislas Rolland <typo3@sjbr.ca>
[BUGFIX] Fix PHP warning with CTYPE=media

Check for array type before checking the variable with isset().
If the variable is a string the isset() will cause a PHP warning.

Resolves: #59544
Releases: master, 6.2
Change-Id: I766292a3dc0365a40acff5fd5f089f7ea78e0b70
Reviewed-on: http://review.typo3.org/33191
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
[BUGFIX] Do not use invalid TSConfig in linkvalidator

To display the linkvalidator error messages for linkhandler link types,
the name of the linked table is read from the TCA instead from page
TSconfig (from a hardcoded page UID 1).

Resolves: #54523
Releases: master, 6.2
Change-Id: I165813a03cd4574c20981e35a9e53cfdeacfc421
Reviewed-on: http://review.typo3.org/26502
Reviewed-by: Philipp Gampe <philipp.gampe@typo3.org>
Tested-by: Philipp Gampe <philipp.gampe@typo3.org>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
[BUGFIX] RTE references non-existent xml files

References should be to xlf files.

Releases: master, 6.2
Resolves: #62112
Change-Id: I670e0f7f8af422d710c85c76f87b25527ceb1c38
Reviewed-on: http://review.typo3.org/33214
Reviewed-by: Stanislas Rolland <typo3@sjbr.ca>
Tested-by: Stanislas Rolland <typo3@sjbr.ca>