Add ThreePanesView extension (#40)
Add ThreePanesView extension (#40)

* Add ThreePanesView extension

* Update extensions.json

Co-Authored-By: nicofrand <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@nicofrand.eu>

Frenzie/Extensions,FreshRSS/Extensions,FreshRSS/Extensions,Frenzie/Extensions,Frenzie/Extensions,FreshRSS/Extensions