new: [UI] Refactored the feed preview index UI to the new tab system
new: [UI] Refactored the feed preview index UI to the new tab system

SteveClement/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,SteveClement/MISP,MISP/MISP,FIRSTdotorg/MISP,MISP/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,SteveClement/MISP,SteveClement/MISP,SteveClement/MISP,FIRSTdotorg/MISP,MISP/MISP,MISP/MISP,MISP/MISP,FloatingGhost/MISP,FloatingGhost/MISP