feat(ScreenObtainer): trigger external for not verified site
feat(ScreenObtainer): trigger external for not verified site

Will trigger external installation also for sites that are not the main
whitelisted domain. This allows to reuse one extension for many sites
(they still have to be on the whitelist, but only one can be "main").

jiyeyuran/lib-jitsi-meet,damencho/lib-jitsi-meet,jitsi/lib-jitsi-meet,jitsi/lib-jitsi-meet,adambowles/lib-jitsi-meet,adambowles/lib-jitsi-meet,nevermind-corp/ljm