Added comment to clarify what the line of code is doing

Author: clowreed

components/lib/usePopover.es6.js

@@ -7,6 +7,7 @@ function usePopover (isProcessing) {
     (popoverName) => {
       if (isProcessing) return
 
+      // If the clicked popover name is the same, set it to null to close it. Otherwise set it to the name of the clicked popover to open it
       setActivePopover((current) => (current === popoverName ? null : popoverName))
     },
     [isProcessing],