DialogKey

https://www.curseforge.com/wow/addons/dialogkey

Adds the ability to bind a button (default: spacebar) that can accept popup dialogs, select quests at quest givers, complete quests, etc. when pressed.

Shadowlands Adjustments

Adjusted version of the original wow-dialog key addon to work with WoW Shadowlands.
Can be installed by downloading the ZIP manually or using CurseBreaker:
CB> install https://github.com/Kayakflo/wow-dialogkey

The original repo can be found here:https://github.com/TonyRaccoon/wow-dialogkey

This repo might be deleted or turned private once the adaptions are merged into the original repo and published on curse.