Refactor BrowserCheck class to store browser data and call the "determineBrowser" external interface method only once.

Merge branch '2x-client-theme' of https://github.com/riadvice/bigbluebutton into riadvice-2x-client-theme

[HTML5] - add translation files from Transifex

[HTML5] Fix user-list scroll shadow and message list max height

[HTML5] Redis class refactor

[HTML5] - Update focus styles

Fix for the Pencil Mongo additions

[HTML5 client] Temporarily hide moderator view of lock settings

[HTML5 client] Add missing states in emoji button icon change

[HTML5 Client] Fix for locales containing `_`

[HTML5] -Allow HTML5 Moderator

[HTML5] - Change toggle-switch  on/off state colors

... And adjusted the way we fetch annotation statuses from the config

Made sure the locales that contain underscore are displayed properly when shown as current language in the Settings window.

Updating presenter status