- Added tests and raised the minimum TPC.

- Added MoveRequest parameter to update the parent field
- Moved the update at the top level progress-wise
- Reporting progress for each individual child that is updated.

- Added the parent field update to the refactoring MoveJob

- Fixed broken CurrentSpaceReferenceProvider implementation which was not really Nested Spaces friendly. It was throwing away all the parent spaces of a space reference, thus resulting in a top level space every time (i.e. wikiReferenceName:spaceReferenceName)

* More consistent prefix.

* fix test

* Moved back translation put by error as deprecated
* Also use uppercase for "Page Translation" Panel (instead of "Page translation"). All Panel titles use an uppercase first letter for words.

XWIKI-13008: When deleting a page from a space that only contains WebPreferences, propose to delete children too
- Automatically checking the 'Affect children' checkbox in this special case.

XWIKI-12817: Javascript EntityReferenceTree doesn't support sibling nodes with the same name but different types
- Fixed EntityReferenceTreeNode.getChildByReference()
- Added tests

[misc] fix typo

XWIKI-12784: EntityReferenceTree doesn't support sibling nodes with the same name but different types
- Applied the same solution that was done on the server side, of making the children values maps of <type, node>.
- TODO: fix getChildByReference and maybe add some tests

* Marked the Spaces panel as deprecated
* Updated the NewPage Panel to support space references in the space input field (i.e. Nested Spaces)

XWIKI-12874  There is no way to get the reference to the subscriber in the XWiki.WatchListMessage template

XWIKI-12874 : There is no way to get the reference to the subscriber in the XWiki.WatchListMessage template

XWIKI-12874 :  There is no way to get the reference to the subscriber in the XWiki.WatchListMessage template

XWIKI-13094: Corrupted context during mail preparation cause templated mails to not being sent to all recipients

 * added detailed comment about the issue, consequences, and solution

XWIKI-13094: Corrupted context during mail preparation cause templated mails to not being sent to all recipients

[Misc] Remove some more reference to oldish and deprecated xwiki/1.0 + some minor javadoc improvements

* fix variable name