Put all toolbar logic in TopToolbarMediatorAIR to avoid double mediator registration.

...h/air-client/src/org/bigbluebutton/air/chat/ChatConfig.as

...rg/bigbluebutton/air/chat/views/TopToolbarMediatorChat.as

...org/bigbluebutton/air/main/views/TopToolbarMediatorAIR.as

.../org/bigbluebutton/air/participants/ParticipantsConfig.as

.../air/participants/views/TopToolbarMediatorParticipants.as

...ient/src/org/bigbluebutton/air/settings/SettingsConfig.as

...uebutton/air/settings/views/TopToolbarMediatorSettings.as

...utton/air/settings/views/TopToolbarMediatorSubSettings.as