Thanks for that suggestion. Something weird is happening. I deactivated all plugins, the SHIFT-F5 refreshed the plugin management page. Then went to the “Customize” appearance page. Voila! The button editing menus were back! However, if I SHIFT-F5 the customizer again, the button editing controls disappeared.
It seems like disabling one or two plugins helps temporarily for some reason. I was able to remove one button and edit the text on the other. When I refreshed the page, however, my button controls were once again missing. The good news is that my changes stayed.
I did a secondary test to see what would happen if I made a new product, then came back to the customizer. Lo and behold the button controls were still there. However, when I refreshed (with F5 only this time), the controls disappeared.
So … HERE IS THE WORKAROUND I CAME UP WITH:
1) Toggle disabling/enabling of one or two plugins (make sure that any Facebook or Twitter plugins are disabled also).
2) Navigate to the customizer. Your button edit dialogs should be there.
3) Edit your buttons and click “Save and Publish”.
4) Now even if you refresh the page and the controls disappear again, your changes should still remain.
5) Repeat this process for any other button changes.
Finally, I should note that it seemed that the Twitter plugin and the Facebook Like plugin (and possibly Duplicator also), needed to be disabled or this workaround would not work.
Here are the links to the Twitter and Facebook plugins that seemed to be conflicting:
https://wordpress.org/plugins/twitter/
https://wordpress.org/plugins/facebook-like-box-widget/
By investigating and attempting to duplicate this issue and updating your wonderful theme, customers and users will experience less frustration and waste less time and money trying to troubleshoot the button issue themselves.
Kind Regards,
Codewizard13 (AKA: Codeslayer2010, Eric L. Hepperle)
https://github.com/codewizard13