Improve display of too long path in the create page UI

Right now the text displayed is a technical serialized refernece (with escaped dots for ex), see screenshot at https://www.xwiki.org/xwiki/bin/view/Documentation/UserGuide/Features/DocumentLifecycle/#HLimitations

Suggestion: reuse the breadcrumb style

Rationale:

• User friendly
• It's smallish which is good since the path is long
• It uses the same style the users sees in the create page UI
• It separates clearly the text content from the path displayed