Merge remote-tracking branch 'upstream/master' into issue-5191

...tton/core/apps/groupchats/CreateGroupChatReqMsgHdlr.scala

...on/core/apps/groupchats/SendGroupChatMessageMsgHdlr.scala

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

...b/src/main/java/org/bigbluebutton/api/MeetingService.java

.../bigbluebutton/presentation/imp/Pdf2SwfPageConverter.java

...rg/bigbluebutton/presentation/imp/SvgImageCreatorImp.java

bigbluebutton-client/locale/en_US/bbbResources.properties

.../org/bigbluebutton/modules/chat/views/ChatOptionsTab.mxml

...ent/src/org/bigbluebutton/modules/chat/views/ChatTab.mxml

...nt/src/org/bigbluebutton/modules/chat/views/ChatView.mxml

.../bigbluebutton/modules/users/views/MediaItemRenderer.mxml

...igbluebutton/modules/users/views/RoomActionsRenderer.mxml

...bigbluebutton/modules/users/views/StatusItemRenderer.mxml

...rc/org/bigbluebutton/modules/users/views/UsersWindow.mxml

...luebutton-html5/imports/api/users/server/eventHandlers.js

...mports/api/users/server/handlers/userInactivityInspect.js

...l5/imports/api/users/server/handlers/validateAuthToken.js

bigbluebutton-html5/imports/api/users/server/methods.js

...tml5/imports/api/users/server/methods/userActivitySign.js

...utton-html5/imports/api/users/server/modifiers/addUser.js