[nobug] Nit: badge icon should be set to not handle taps (#4924)
[nobug] Nit: badge icon should be set to not handle taps (#4924)

In simulator I can click right on the badge and the button won't
activate. On an actual device I can't repro it. For correctness,
the badge should not accept taps.
Update to Xcode 10.2.1, Swift 4.2 (from 4.0).
flodolo/firefox-ios,Bunn/firefox-ios,flodolo/firefox-ios,st3fan/firefox-ios,mozilla-mobile/firefox-ios,StYaphet/firefox-ios,Bunn/firefox-ios,Acidburn0zzz/firefox-ios,mozilla-mobile/firefox-ios,Bunn/firefox-ios,flodolo/firefox-ios,flodolo/firefox-ios,StYaphet/firefox-ios,justindarc/firefox-ios,AaronMT/firefox-ios,Acidburn0zzz/firefox-ios,Bunn/firefox-ios,Acidburn0zzz/firefox-ios,mozilla-mobile/firefox-ios,mkaply/firefox-ios,StYaphet/firefox-ios,AaronMT/firefox-ios,AaronMT/firefox-ios,flodolo/firefox-ios,mkaply/firefox-ios,mozilla-mobile/firefox-ios,st3fan/firefox-ios,StYaphet/firefox-ios,garvankeeley/firefox-ios,mkaply/firefox-ios,Acidburn0zzz/firefox-ios,Acidburn0zzz/firefox-ios,mkaply/firefox-ios,st3fan/firefox-ios,garvankeeley/firefox-ios,st3fan/firefox-ios,Acidburn0zzz/firefox-ios,StYaphet/firefox-ios,mkaply/firefox-ios,garvankeeley/firefox-ios,garvankeeley/firefox-ios,Acidburn0zzz/firefox-ios,AaronMT/firefox-ios,mkaply/firefox-ios,justindarc/firefox-ios,AaronMT/firefox-ios,justindarc/firefox-ios,garvankeeley/firefox-ios,justindarc/firefox-ios,StYaphet/firefox-ios,Bunn/firefox-ios,mozilla-mobile/firefox-ios,st3fan/firefox-ios,flodolo/firefox-ios,flodolo/firefox-ios,justindarc/firefox-ios,justindarc/firefox-ios,garvankeeley/firefox-ios,st3fan/firefox-ios,Bunn/firefox-ios,AaronMT/firefox-ios,mozilla-mobile/firefox-ios,mozilla-mobile/firefox-ios,StYaphet/firefox-ios,st3fan/firefox-ios,AaronMT/firefox-ios,StYaphet/firefox-ios,Acidburn0zzz/firefox-ios,mkaply/firefox-ios,Bunn/firefox-ios,st3fan/firefox-ios,garvankeeley/firefox-ios,justindarc/firefox-ios