Fix for chat bubble top margin.
Fix for chat bubble top margin.

mgbennet/BotFramework-Emulator,rinormaloku/BotFramework-Emulator,rinormaloku/BotFramework-Emulator,defining-technology/BotFramework-Emulator,defining-technology/BotFramework-Emulator,mgbennet/BotFramework-Emulator,defining-technology/BotFramework-Emulator,rinormaloku/BotFramework-Emulator,mgbennet/BotFramework-Emulator