- Reuse the same Theme to multiple subwikis;
- Have all the Themes in the main wiki and just call them from sub-wikis.
Currently we cannot select a Theme from the main wiki, since we have a select that lists the themes just from the current wiki, see images.
Also in Edit mode we have the select.
The solution is to import the Theme in the needed wiki, but if you want to reuse in multiple subwikis, the code will be duplicatedin each imported theme.