Merge pull request #4593 from antobinary/pods_vol4

...ore/apps/presentation/GetPresentationInfoReqMsgHdlr.scala

...bluebutton/core/apps/presentation/PresentationApp2x.scala

...core/apps/presentation/RemovePresentationPubMsgHdlr.scala

.../apps/presentation/SetCurrentPresentationPubMsgHdlr.scala

...tton/core/apps/presentationpod/PresentationPodHdlrs.scala

...e/apps/presentationpod/RemovePresentationPubMsgHdlr.scala

...cala/org/bigbluebutton/core/models/PresentationPods.scala

...n/scala/org/bigbluebutton/core/running/MeetingActor.scala

...ala/org/bigbluebutton/common2/msgs/PresentationMsgs.scala

...org/bigbluebutton/common2/msgs/PresentationPodsMsgs.scala

...nt/src/org/bigbluebutton/main/api/ExternalApiCallbacks.as

...rg/bigbluebutton/modules/present/business/PresentProxy.as

...bigbluebutton/modules/present/events/PresenterCommands.as

...ebutton/modules/present/events/RemovePresentationEvent.as

...luebutton/modules/present/services/PresentationService.as

...ton/modules/present/services/messaging/MessageReceiver.as

...utton/modules/present/services/messaging/MessageSender.as

...bluebutton/modules/present/ui/views/FileUploadWindow.mxml

...uebutton/modules/present/ui/views/PresentationWindow.mxml

...org/bigbluebutton/modules/present/ui/views/SlideView.mxml