Luxe Jahia Demo check_circle

This version fixes an few inconsistencies and security issues:

• The site is no longer forced to be named luxe for queries to work (#347)
• GraphQL queries are static and typed (good development practice) (#348, #350)
• The real estate search page is now built in pure GraphQL (instead of GraphQL + JCR-SQL2) (#351)
• The default richtext toolbars are used to be compatible with both CK4 and CK5 (#355)
• Fix an XSS injection in realtor pages (#354)