Put news feed completion on main thread.
Put news feed completion on main thread.

syoung-smallwisdom/ResearchUXFactory-iOS,Sage-Bionetworks/BridgeAppSDK,Sage-Bionetworks/BridgeAppSDK,syoung-smallwisdom/ResearchUXFactory-iOS,syoung-smallwisdom/ResearchUXFactory-iOS,Sage-Bionetworks/BridgeAppSDK,Sage-Bionetworks/BridgeAppSDK,Sage-Bionetworks/BridgeAppSDK,syoung-smallwisdom/ResearchUXFactory-iOS