escapeHTML func fix

Author: Weedshaker

src/helpers/Helpers.js

@@ -52,6 +52,7 @@ export const scrollElIntoView = (getScrollElFunc, notIntersectingSelector = null
 
 // https://stackoverflow.com/questions/30661497/xss-prevention-and-innerhtml
 export const  escapeHTML = unsafe_str => {
+  if (!unsafe_str) return ''
   return unsafe_str
     .replace(/&/g, '&')
     .replace(/</g, '&lt;')