presentation recording: generate poll svg images without gnuplot

Write a tool that generates the poll svg images directly from the
BBB poll description. This avoids the issues with special characters
in the gnuplot labels, and gives us a lot more flexibility in how
the polls are formatted and styled.

Fix guest icon

Multiple cameras

Add handling route for GetRunningMeetingsReqMsg

Fix shared notes notification

webdriver* and wdio* packages are not node12 ready

Prevent no-mic warning displaying when recording is stopped

Fix keyboard shortcuts not working

Fix 'wget-log' issue in bbb-conf

Switch to using curl instead, which doesn't have this problem (and
outputs to stdout by default, too)

Fix spacing in note button

Reduce size of mic icon in talking indicator

Prevent chat error shifting input field

Pull v2.2.x release into master

Making the interface functional for the multiple webcams. This must change after thinking on a design