[BUGFIX] FormEngine gaps, sections and borders

* Padding & margins
* Section headline
* First section border top
* Hover link (everywhere)

Resolves: #62999
Releases: master
Change-Id: Ib617cf01644b2d11e022f4e318a745961ddd8860
Reviewed-on: http://review.typo3.org/34223
Tested-by: Benjamin Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
[TASK] Add css and less files to .editorconfig

Resolves: #63003
Releases: master, 6.2
Change-Id: I80a81e15afc71398d9607848160b8805407172fe
Reviewed-on: http://review.typo3.org/34236
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
[TASK] Update DataTables version

This patch replaces the DataTables version in contrib. It updates the
library from version 1.9.4 to 1.10.2. Currently just the extension
manager, language and documentation module are using it.

Resolves: #62993
Releases: master
Change-Id: Ie8dd5aa0da1d609922610d24daf9776c5c78ebc4
Reviewed-on: http://review.typo3.org/34215
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
[BUGFIX] Docheader delete icon in EXT:scheduler is white

The delete icon in EXT:scheduler while editing/creating
a task is white instead of black.

Resolves: #63001
Releases: master
Change-Id: I5566db3268d8d3b2230c88f753cfc2410595c619
Reviewed-on: http://review.typo3.org/34235
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
[TASK] Increase verbosity of exception

Appends package path of invalid composer packages to
the exception message to help identifying the cause.

Resolves: #59998
Releases: master, 6.2
Change-Id: Ie09212c17e15e4193eef422758f001cb289c73ef
Reviewed-on: http://review.typo3.org/34241
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
[BUGFIX] Show removal link in clipboard only if elements are available

The removal link in the clipboard is always shown, no matter if
elements are stored in the clipboard or not.

Resolves: #63016
Releases: master
Change-Id: I55c207be3a9acfd0c2a68c29299655a46b83df77
Reviewed-on: http://review.typo3.org/34253
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>