XWIKI-10765: "Solr" and "Lucene" words are not capitalized on "Search Suggest" from "Administration"

XWIKI-10765: "Solr" and "Lucene" words are not capitalized on "Search Suggest" from "Administration"

XWIKI-11028: Create dedicated groups for Colibri and Flamingo ColorThemes inside the Administration-Presentation.

* Put the displayer for the color theme input in a separated page, to avoid code duplication between xwiki-enterprise-ui-admin-user and xwiki-enterprise-ui-wiki.
* Add translation keys.

This reverts commit 9527f710. Fix PR mess..

XWIKI-11048: Capitalize the "Save" button from "Configuration"
* Use translation key instead of hard-coded label

This reverts commit ae679934.

* change the @since

XWIKI-11041: When {{xwiki.defaultbaseskin}} is empty, XWiki#getDefaultBaseSkin() returns {{xwiki.defaultskin}}.
* some optimizations

- use urltool for a better query string handling

- update list of tools installed by default

XWIKI-11041: When {{xwiki.defaultbaseskin}} is empty, XWiki#getDefaultBaseSkin() returns {{xwiki.defaultskin}}.

* xwiki.defaultbaseskin can now be empty.

* Fix variable not being evaluated...

XWIKI-11041: When {{xwiki.defaultbaseskin}} is empty, XWiki#getDefaultBaseSkin() returns {{xwiki.defaultskin}}.

XWIKI-11039: Move User and Group displays into a Velocity macro

quick fix to have at least spaces working

use a more painstaking aproach to make sure querystring is really url encoded
(and therefore contains no dangeling <> or ') while avoiding
to url-encode twice these values that have been already encoded properly

* Fix another bug...

* Fix bug

XWIKI-11020: Gallery widget sets invalid dimensions for container element in maximized mode