Improve chat look and feel

Test in one device of your choice. Login in the app and enter a chat activity. Enter the same activity with different user using another device or the website. Enter the chat in both devices. Write each other. Open users modal (top right button). Check it opens in a lateral modal. Beep each other. Check beeps to your user are in orange and beeps to another users are in gray. Open again and "Talk to" each other. Check it says "said to" in bold. Now write /me says hello and send on both users. Check these commands are shown in blue. Check enter and exit messages are shown in green and red. Check full look and feel is similar to messages. Finally go back and enter on "View past chat sessions" and check one. Check the look and feel is the same.