Hide MediaWiki's "Editing help" link, as we provide it in the toolbar

Ported from Vector extension's ext.vector.footerCleanup module, but
with less hacks. Depends on change Id9269876 in MediaWiki core.

Also remove unhelpful comments.

Bug: 43689
Change-Id: I36ecd06b6fc0cc5ce95bc43db303b1b542e6c81b
Localisation updates from http://translatewiki.net.

Change-Id: I3ef483696a24b86b3908187738097b74fa2a2369
Localisation updates from http://translatewiki.net.

Change-Id: I39d36eb94755e07e791c9e9414ddd958b8cdadfd
Localisation updates from http://translatewiki.net.

Change-Id: Idd6cf53775c4bd3f47fd774881c9c1d6e3a839aa
Localisation updates from http://translatewiki.net.

Change-Id: Ifc5d2405d3c63f7e14e77557464d3064bbc2696e
Localisation updates from http://translatewiki.net.

Change-Id: Ib23c695b99994af5f4f870e328cba915ba01855b
Localisation updates from http://translatewiki.net.

Change-Id: Ie55eae3e4f075dd18e477e06de9650cb19c0b846
Localisation updates from http://translatewiki.net.

Change-Id: Ieaa3cd812371e4d486939dab04e642460eb26c3f
Localisation updates from http://translatewiki.net.

Change-Id: I0ee8f2a08ea7096c716c7eb93fccbf1067b420a9
Localisation updates from http://translatewiki.net.

Change-Id: I92731ae2d2ebfd1b56855a7815f8061cffd6a00b
Merge "Hide MediaWiki's "Editing help" link, as we provide it in the toolbar"
Localisation updates from http://translatewiki.net.

Change-Id: I314e4f6176973ff0a3d3a72ef37f60ae6b03657a
Localisation updates from http://translatewiki.net.

Change-Id: I3451e441b4919bb4d27a8ee1da5c0487d89a3bf1
Localisation updates from http://translatewiki.net.

Change-Id: I86e17ea33ced67dceb2be7add494499a7048ab38
Localisation updates from http://translatewiki.net.

Change-Id: Ic344bbbf59a0f48b37601a4e4d809c8a2c3a128f
Remove extra comma to avoid fatal in IE7

jslint:
modules/jquery.wikiEditor.toolbar.config.js: line 818, col 43, Extra
comma. (it breaks older versions of IE)

Bug: 52715
Follow-Up: I8c5a52c74fa1bc83c662d748731f96bcd91374d0
Change-Id: I99c16f01176a954ad924a5c493e43fb47206fa4b
Remove extra comma to avoid fatal in IE7

Followup to:I99c16f01176a954ad924a5c493e43fb47206fa4b

Change-Id: I4394b252ffee93f4647d1908c29626c20bb82366
Localisation updates from http://translatewiki.net.

Change-Id: I5816be9f5264330598d0e902c9b6465654ec15e9
Localisation updates from http://translatewiki.net.

Change-Id: I31f932f40a939c01b3ae1a34b487bbb149bc1542
Localisation updates from http://translatewiki.net.

Change-Id: I8eaacf49ea2ef266a9c1fca8edbd2bd124d9a710