Overview:
It is possible with MediaWiki to enable some hierarchical organization into wiki pages with "subpages" (here : http://www.mediawiki.org/wiki/Help:Subpages) and it's enabled directly on talk pages and user pages.
But there is no possibility to modify the breadcrumb presentation with a dedicated page in MediaWiki namespace.
Actual Results:
Any modification needs some dev skills to be done.
Expected Results:
Be able to influence how breadcrumbs are visualized.
@Misdre this request isn't clear. What are you referring to with "breadcrumb"? Do you want to be able to move pages around more easily?
But there is no possibility to modify the breadcrumb presentation with a dedicated page in MediaWiki namespace.
You can adjust the #contentSub or .subpages definition in MediaWiki:Common.css, however I don't see a way to change the |. It should probably be changed to a CSS pseudo "after" class.
That's a bit old and I'm not sure I remember exactly what I had in mind, but I believe I was hoping for a page in the MediaWiki namespace to be created (such as MediaWiki:Upload-source) where parts of the breadcrumb ("<", "|") could be edited and use for examples images or unicode arrow symbols. This is very minor though.
The .subpages class can be used in MediaWiki:Common.css to style using pseudo CSS elements. T50443 seems like a useful addition but I don't think we should add complexity to the software.