HTML5 - comment out unimplemented presenter slide control UI

UI Changes Update

The reason there was so much space between `Join Audio` and `Status` was that `Join Video` was in between. Join Video was removed
to fix this positioning.

Leave Audio and Join Video icons are being hidden, which still holds the space for that component in the DOM, but does not show
it.
`Join Audio` should not be commented out because the icon is displayed at certain times.
`Join Video` can be commented out for now for UI purposes and put back when it's implemented.

[HTML5] Mic Volume and Device Selector

Client logging changes - add json structure to some additional logs

Updated landingage page for 1.1-beta

Hide Cam button Temporarily

update bbb-client-check for 1.1(-beta)

Try and work around transparent Flash blocking

HTML5-clent scroll on chat

Fix double display of webcams on reconnect #3250

Action bar & join audio improvements

Working on avoiding reconnection when ending a meeting by API call

Updates to the Flex 4 applications