XWIKI-9740 : Categories field updates (check / uncheck) are not taken into account after adding a new category when editing a blog post
Merge branch 'master' of https://github.com/xwiki/xwiki-platform
XWIKI-9814: DW Step3 Wikis: the same wiki is proposed multiple times.
Merge pull request #250 from gdelhumeau/XWIKI-9814

XWIKI-9814: DW Step3 Wikis: the same wiki is proposed multiple times.
XWIKI-9821: Confluence import and XAR export: output written as XML, not xar
Synchronize with extension.xwiki.org, seriously guys...
XWIKI-8156: Don't show Extension Features information by default
XWIKI-9825: Allow XWikiPluginManager to find plugin installed as extension
Merge branch 'master' of https://github.com/xwiki/xwiki-platform
XWIKI-9694: Allow specifying a version of the default-ui in the war pom instead of always using the version of the war
Merge branch 'master' of https://github.com/xwiki/xwiki-platform
XWIKI-9740 : Categories field updates (check / uncheck) are not taken into account after adding a new category when editing a blog post
- fixing escaping problem that breaks a xwiki-enteprise-test-escaping test
- also making sure that unchecked categories remain unchecked in a blog post when editing it and adding a new category
XWIKI-9835: Upgrade to HSQLDB 2.3.1
XWIKI-9834: Allow to create and delete wikis when using H2
[Misc] Fix exception handling and error reporting which were not following our practices
XWIKI-9836: Remove deprecation warnings from the Distribution Wizard
XWIKI-9834: Allow to create and delete wikis when using H2
* Added config