"Code" Macro Should Support Inline Editing

The "Code" macro should support inline editing.

I was excited when I read about inline editing support being added to Xwiki and actually was a pretty disappointed that this is not yet possible in the new LTS Xwiki 11.10 and we're now stuck without this feature for at least another year till the next LTS release.

Actually, the "Code" macro should be especially suited for this feature.