This has been logged here: Editor: Make playlist fullscreen doesn't resize thumbnail · Issue #3305 · xibosignage/xibo · GitHub
The ‘New Configuration’ should only be available for Data Elements as it is used to set alternate data sources for multiple data elements to pull from. (New configurations for data elements are further explained in the Menu Board Guide.
This issue has been recorded here: Global Elements: New configuration shouldn't be enabled · Issue #3306 · xibosignage/xibo · GitHub
With regards to the naming, I have raised this with our dev team who have explained the following:
"The problem here is that the name is the name for the Canvas Widget, not the element, there is an issue for naming elements that might make that easier to follow.
Again, thanks for identifying these.
As always very much appreciated!