Implements tooltip and label to the button to take over the captions

Clean up user roles

Improve client reconnection

Add ping-pong message to html5 client

Fix cannot read property 'focus' of null

Avoid re-defining userAgent in kurento-utils.js

Addresses the error seen in
`"stackTrace":"TypeError: can't redefine non-configurable property \"userAgent\""`

Note, there are still definitions of `ua` in the code so ideally we need to extract this out.

Add lock verification for users actions

Prepend sessionToken to uniqueClientSession

Logging structure - add extraInfo: {}

Add enabled poll property in settings.yml

Fixes performance bug when youtube video is shared

Fix regression from #7606