fix: Potential reflected XSS on older browsers in the histogram
fix: Potential reflected XSS on older browsers in the histogram

- As reported by Dawid Czarnecki

FloatingGhost/MISP,SteveClement/MISP,FIRSTdotorg/MISP,MISP/MISP,devnull-/MISP,TheDr1ver/MISP,SteveClement/MISP,FloatingGhost/MISP,Rafiot/MISP,Rafiot/MISP,devnull-/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,devnull-/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,FIRSTdotorg/MISP,Rafiot/MISP,FIRSTdotorg/MISP,MISP/MISP,Rafiot/MISP,SteveClement/MISP,MISP/MISP,FloatingGhost/MISP,FloatingGhost/MISP,TheDr1ver/MISP,devnull-/MISP,MISP/MISP,TheDr1ver/MISP