Adding a cross-post button on the front bar as well

**Is your feature request related to a problem? Please describe.**
As a user who cross-posts a lot, having to access the ellipsis menu and scroll all the way down to cross-post is a pain.

**Describe the solution you'd like**
I would like the cross-post button to be added as well to the front bar for easy and quick access, if possible, to the right of the reply button.


**Describe alternatives you've considered**
Keep using the current method

**Additional context**
Maybe the front bar could be customizable, so users can decide which button they want to add on it.