XWIKI-9411: Replace "Workspace" term by "SubWiki".

* Changing the workspace translation keys content for English & French.
XWIKI-9411: Replace "Workspace" term by "SubWiki".

* Minor fix.
XWIKI-9411: Replace "Workspace" term by "SubWiki".

* Changing the workspace translation keys content for English & French.
XWIKI-9412: Add a UI to handle the new "SubWiki Creation" right in the Administration.

* I have added a MultiWikis page in the General section of the Administration
* In this page, you have a message if workspace-template is not installed.
* In this page, you can set who has the SUBWIKI_CREATION right.
* The template rightsUI.vm has been modified to handle this new page.
XWIKI-9414: Do not display "Subwikis directory" if there is no subwiki.

Trivial implementation.

It could be better to check if there is a workspace where the user has an access, but I guess it would have a higher cost and this template.vm is used everywhere.
XWIKI-9414: Do not display "Subwikis directory" if there is no subwiki.

* Replace $listtool.size($services.workspace.getWorkspaces())>1 by
  $services.workspace.getWorkspaces().size() > 1 since getWorkspaces()
  always returns a list.
XWIKI-9415: Create a new SubWiki creation wizard.

* I have replaced WorkspaceManager.CreateNewWorkspace by my new wizard. I'm not sure about how this page should be called.
* In the future, I would like to make a new "createSubWiki" action in XWiki, and put this wizard in a .vm instead of having it on a page.
XWIKI-9415: Create a new SubWiki creation wizard.

* Fixing translation keys.
* Adding a check to see if a workspace template exists.
XWIKI-9415: Create a new SubWiki creation wizard.

* Replacing .wizard-half by .wizard-body .half
XWIKI-9412: Add a UI to handle the new "SubWiki Creation" right in the Administration.

* Rename admin.multiwikis.* to admin.subwikis.*
XWIKI-9412: Add a UI to handle the new "SubWiki Creation" right in the Administration.

* Rename "MultiWikis" to "Subwikis".
* Set "Subwikis" in first position inside the "Configuration" section.
XWIKI-9412: Add a UI to handle the new "SubWiki Creation" right in the Administration.

* Move XWiki.AdminSubWikisSheet from xwiki-platform-administration-ui to xwiki-platform-workspace-ui
* Add a ConfigurableClass to it instead of hacking XWiki.AdminSheet
** Because of this, the Subwiki section will be at the bottom of the "Application" section instead of being in the first position of "General".
** It will be fixed when we will use UI Extension Point instead of ConfigurableClass in the Administration.
XWIKI-9412: Add a UI to handle the new "SubWiki Creation" right in the Administration.

* Move some translations from ApplicationResources.properties to WorkspaceManager.Translations.
XWIKI-9405: Add a "Wiki Creation" right.

* Rename "SubWikiCreation" right to "WikiCreation" right.
XWIKI-9405: Add a "Wiki Creation" right.

* Rename "WikiCreation" right to "CreateWiki" right.
Merge pull request #152 from gdelhumeau/XWIKI-9405

XWIKI-9405: Add a "Wiki Creation" right
* Rename "Subwiki" in "Wiki" and changed right name after suggestion from Eduard Moraru
Merge pull request #148 from gdelhumeau/XWIKI-9414

XWIKI-9414: Do not display "Wikis directory" if there is no subwiki
XWIKI-8820: Introduce framework to stream wiki data from one representation to another
* missing jacoco setup, strangely the build does not fail when building without it on my side
XWIKI-9415: Create a new SubWiki creation wizard.

* Rename "subwiki" to "wiki".
Merge pull request #149 from gdelhumeau/XWIKI-9415

XWIKI-9415: Create a new wiki creation wizard