Ability to exclude diff signs from "changes" copied contents

[teocns]

Is your feature request related to a problem? Please describe.

Copying (<C-o>) from the "changes" panel adds + and - symbols on the first column of each line as diff contents are copied.

Describe the solution you'd like

To optionally enable / disable including diff signs in the copy buffer, or the ability to bind such filtered copy mode to an other key-mapping different than <C-o>