I just opened a feature request:
https://inductiveautomation.canny.io/ignition-features-and-ideas/p/optionally-lock-out-saveall
If any of you have ever accidentally hit SaveAll in Designer and had that “oh-NO!” moment when you realized you now need to go clean up a mess of things you didn’t want to save, please go upvote that.
I’ve had this happen because I just happened to look at something in Designer which made it consider that item changed (like reports or named queries), and sometimes I was just tinkering with debug changes. Either way, I’ve been annoyed by this too many times.