XWIKI-9970: Look at 'displayMainMenu' in edit mode

* The 'displayMainMenu' is now checked before loading the 'menuview.vm' in edit
mode
[misc] Code style
XWIKI-9782: New Crypto Service API

- Internal improvement to the signing API
XWIKI-9782: New Crypto Service API

- New PKIX modules to manage X.509 certificates
XWIKI-9782: New Crypto Service API

- switching new PKIX module to 6.0-SNAPSHOT
XWIKI-9979: During Step 4 - Report from DW, clicking on the Rollback button generates a Velocity error
fixed typo
Merge pull request #260 from msmeria/patch-2

fixed typo
XWIKI-9979: During Step 4 - Report from DW, clicking on the Rollback button generates a Velocity error
XWIKI-9990: Unable to leave a wiki as a local user.
 XWIKI-9997: DefaultWikiCopier copies files that have translations multiple times.
[misc] Add missing @since
Fix comment
XWIKI-9994: DW is wrongly started after the creation of a wiki using a template
XWIKI-9975: In 'Progress' tab, inconsistency when displaying page names
* Properly display the document referene as wiki >> Space >> Page (3 separated links).
XWIKI-9996: The provisioning does not say when error occurs.
XWIKI-9985: After a migration the Wiki Index lists old-style wikis (not workspaces) as having only the following Membership Type: "Only an admin can invite a user" no matter if the wiki is public or private.

* Improvement label: "Only admins can send invitations"
[misc] Add missing @since
XWIKI-10005: Underline and strikethrough styles are lost when exporting to odt
XWIKI-9999: Add a validation key to the forms of the Wiki Application.