Confirmed. Just a note, if Project Settings are made to work separately as suggested, it would be a good idea to put the project name in the project settings title bar so that you know which project settings you are working on. It would be “a nice to have feature” to be able to open two different project settings to compare/duplicate at the same time for projects that were created with different templates or at different times.
I believe the main problem here is that there are aspects of this panel which benefit from it being modal, and with the toolkit used to make the software (or perhaps even Windows at large), there is no concept of a modal dialogue being attached to a single window and blocking only it. Otherwise, Compile as well would be another great candidate for per-project blocking instead of rendering every project inaccessible until you’re done.
I do agree it would be nice, particularly in how eventually it is supposed to be simple to drag and drop settings between Project Settings panes—but we’re probably going to have to make do with Copy and Paste only for that, given the limitations.
I don’t know the answer to that myself, sorry. Sometimes the reason has to do with technical plumping or performance, rather than what seems logical on the surface. There is potentially a lot of scheduling and background work going on in this pane, for instance. Consider deleting your label list entirely—could be that causes thousands of items to require having their assignment settings adjusted, dozens of menus to be updated on the fly if you have a lot of Quick Ref windows open, etc. It does that kind of stuff when you click OK, but would that be feasible in a scenario where you could Cancel? Again, I don’t really know—just thinking of potential roadblocks that make sense to me.
As noted above, simple copy and paste from all of the various lists is on the slate for future implementation. The only exception will remain Section Types, which with their level assignment setup is too complex to allow for potential partial copy and paste.