RK-A2

We actually want to provide user a choice of simultaneously selecting multiple themes. This will help us mix up questions with different themes. So, we will actually not go with 3631.

So, in the place where we provide a dropdown, place a button "Choose Your Themes". One should be able to choose and change at any time. Clicking on this should move control to a place below the chat interface where there are multiple bubbles.
-Each bubble is a "theme text" (like "Star Wars" or "Cricket") inside an oval. Users can click it.
-Clicking it toggles the theme on or off. [Other actions based on this will be added to another ticket]