[TASK] Move content icons to IconFactory using SVG

Add content icons using SVG to css_styled_content, felogin,
fluid_styled_content, form, indexed_search and mediace with
IconRegistry-iconIdentifier.

Resolves: #69743
Releases: master
Change-Id: Ic0bcec87dde25401f7f1a0349ced1c0eee455e0d
Reviewed-on: http://review.typo3.org/43256


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>