Merge pull request #1849 from bantu/ticket/11998

[ticket/11998] Introduction of the phpBB Console
[ticket/11998] Make phpbbcli executable and add shebang

PHPBB3-11998
[ticket/12014] Template Event index_body.html before forumlist

Add content above the forums list (on forum index only)

PHPBB3-12014
[ticket/11912] Remove obsolete variable $mimetype from content_guesser

PHPBB3-11912
[ticket/11997] Use $phpbb_filesystem->clean_path() for proper redirect paths

PHPBB3-11997
Merge remote-tracking branch 'naderman/ticket/11998' into develop

* naderman/ticket/11998:
  [ticket/11998] Make phpbbcli executable and add shebang
[ticket/12014] Fix version number in event docs

PHPBB3-12014
[ticket/11472] Make prosilver's editor.js an asset used by all styles.

PHPBB3-11472
[ticket/11472] Make the color swatch configurable and fix it in subsilver2

PHPBB3-11472
[ticket/11472] Update the ACP user signature page.

PHPBB3-11472
[ticket/11472] Use {T_ASSETS_PATH}.

PHPBB3-11472
[ticket/11472] Expand palette cell links to the full block size.

PHPBB3-11472
Merge pull request #1800 from prototech/ticket/11472

[ticket/11472] Make prosilver's editor.js an asset used by all styles.
[ticket/10810] Move the color palette code to core.js.

PHPBB3-10810
[ticket/10810] Make the color palette usable outside of the editor context.

PHPBB3-10810
[ticket/10810] Update all palettes.

PHPBB3-10810
[ticket/10810] Remove obsolete swatch code.

PHPBB3-10810
[ticket/11997] Fix redirects from inside controllers

The redirect url currently uses the web root path. However as we prepend the
full board url later, we need to remove the relative web root path and prepend
the normal root path again. Otherwise redirects from inside routes will not
work as intended.

PHPBB3-11997
[ticket/11997] Fix missing global

PHPBB3-11997
[ticket/12015] Add more parameters to core.viewtopic_get_post_data

PHPBB3-12015