Test MessageSenderWorker with Electron as user agent.
Test MessageSenderWorker with Electron as user agent.

This brings MessageSenderWorker coverage to 100%.

andersk/zulip,brainwane/zulip,tommyip/zulip,timabbott/zulip,zulip/zulip,zulip/zulip,timabbott/zulip,brainwane/zulip,hackerkid/zulip,dhcrzf/zulip,andersk/zulip,rishig/zulip,timabbott/zulip,showell/zulip,rishig/zulip,punchagan/zulip,tommyip/zulip,tommyip/zulip,andersk/zulip,synicalsyntax/zulip,eeshangarg/zulip,dhcrzf/zulip,zulip/zulip,jackrzhang/zulip,shubhamdhama/zulip,rishig/zulip,tommyip/zulip,dhcrzf/zulip,punchagan/zulip,hackerkid/zulip,punchagan/zulip,hackerkid/zulip,jackrzhang/zulip,timabbott/zulip,dhcrzf/zulip,showell/zulip,jackrzhang/zulip,synicalsyntax/zulip,showell/zulip,eeshangarg/zulip,eeshangarg/zulip,rht/zulip,showell/zulip,synicalsyntax/zulip,brainwane/zulip,andersk/zulip,shubhamdhama/zulip,hackerkid/zulip,kou/zulip,synicalsyntax/zulip,showell/zulip,tommyip/zulip,andersk/zulip,brainwane/zulip,zulip/zulip,rht/zulip,kou/zulip,hackerkid/zulip,shubhamdhama/zulip,shubhamdhama/zulip,jackrzhang/zulip,timabbott/zulip,dhcrzf/zulip,hackerkid/zulip,shubhamdhama/zulip,timabbott/zulip,kou/zulip,showell/zulip,punchagan/zulip,eeshangarg/zulip,synicalsyntax/zulip,showell/zulip,andersk/zulip,tommyip/zulip,synicalsyntax/zulip,punchagan/zulip,rht/zulip,shubhamdhama/zulip,rishig/zulip,brainwane/zulip,zulip/zulip,kou/zulip,zulip/zulip,jackrzhang/zulip,tommyip/zulip,rht/zulip,jackrzhang/zulip,punchagan/zulip,rishig/zulip,brainwane/zulip,kou/zulip,eeshangarg/zulip,synicalsyntax/zulip,rht/zulip,punchagan/zulip,andersk/zulip,eeshangarg/zulip,kou/zulip,jackrzhang/zulip,dhcrzf/zulip,timabbott/zulip,zulip/zulip,hackerkid/zulip,dhcrzf/zulip,rht/zulip,shubhamdhama/zulip,rishig/zulip,eeshangarg/zulip,kou/zulip,rht/zulip,brainwane/zulip,rishig/zulip