Modify Compose Message Similar to Web App

[fragm3]

I'm submitting a ... (check one with "x")

• [ ] bug report
• [x] feature request
• [ ] support request => Please do not submit support requests here, instead ask your query in our Gitter channel

Current behavior: Currently, in writing message, both send and mic icons are shown.

Expected behavior: Should be dynamic, GIF:

Steps to reproduce: Type a message

Would you like to work on the issue? Yes