*8411* Fix hover background for font sizer icons
introduce a factory method in VirutlaArrayIterator
*8254* Introduced metrics table
*8254* Introduced metrics related locale keys
*8254* Introduced file loader base task class
*8254* Move code to find bots to core and make the bot file a parameter
*8254* Let usage events plugin hooks being called after download
Fixed setting hooks
Caching bot files list
fixes in file loader
Fixed variable name in comment
Moved code to retrieve path components to core
Fixed router testing