How to add apps to KDE Bottom Bar

I have been playing with KDE since installing Calculate about 3 weeks ago and it has been a wonderful experience (odd USB volume control issue, but it works at the moment).

While attempting to edit the bottom bar, remove apps I do not want or use I realized there is not an easy or obvious way to add the apps I use or want to the bottom bar.

I am asking here instead of the KDE forums just in case it might help someone down the road.

I ran into the Mesa upgrade loop error with Nvidia and found the fix here, so hopefully this will do the same for someone down the road.

(Does Google translate do a good job of translating English to Russian?)