include @ by default when clicking new post button while on a profile

**Is your feature request related to a problem? Please describe.**
Sometimes users have very long @ and long instance and it's frustrating when the autofill doesn't find them

**Describe the solution you'd like**
When on there profile if i click the create post button it should automatically start the post with their @

**Describe alternatives you've considered**
Copy pasting their @ but it's impossible to copy someone's @ from there profile

**Additional context**