Standard desktop Internet Explorer to manage the 1920S out-of-the-box. The Edit and Save buttons will appear toward the bottoms of the information panes.
If I find an answer to this CLI access problem I'll let everyone know. But for your specific issue of not being able to save any changes, you're not going to believe this but you actually have to use NOT Chrome. I could scarcely believe it myself. Coming off of some of the HP 1910's, where I always had issues using IE to manage, this blew my mind. Today, I even forgot this, and scratched my head for 15 minutes trying to reconfigure a relocated switch in Chrome and being unable to save the changes.
I just had to post this because it really is a decent switch and it's a shame that some network managers will never realize its versatility because obviously none of us typically use IE or Edge to manage anything - not even Office365, where Chrome makes IE look like it is frozen.
danielkr