Is your feature request related to a problem? Please describe.
TSM allows user to select a key to use to quickly cancel undercut auctions
With recent changes, cancelling hundreds of auctions is a chore, being able to bind the button to a scroll wheel would make the task much easier on (mine at least) fingers :D

to expand on this, you could also add a key for "post" button in selling tab, so you can just click an item and instantly scroll down to post

Thank you

We already have macros for this.

Selling Post Button Macro

/auctionator post

Undercut scan cancel button macro

/auctionator cancelundercut

For a macro you need to have it placed on the action bars. This is a lazy work-around that TSM handles differently. Instead of having to put a macro on each and every toon that I do auction house with, wouldnt it make more sense to be a addon-assigned hotkey that is enabled when in these specific windows? This is how TSM does it and it works great...