updated translation stuff for Opera store

this addresses https://forums.lanik.us/viewtopic.php?f=64&t=28700

translation work from https://crowdin.com/project/ublock

code review + fixes another potential error in browser console (re. p…

…opup blocking)

new revision

this fixes gorhill#1204

this fixes gorhill#1206

this fixes gorhill#1201

some have reported dashboard does not open: this may help

reverting fix to gorhill#533 because bad side effects