I can't undo my typing in text fields with standard keyboard shortcuts. The icon "x" is misleading - I would think it's about deleting an event and not save&quit (reminiscent of :x in vim? ;)) Change it, please, if you need a single button for this functionality at all. Shouldn't a click on a form field label put focus on the corresponding field? Shouldn't the GTK menu accelerators mechanism work?
I can reproduce the label issue and I indeed noticed that it seems to work at least for example in this bug. Which standard keyboard shortcut does not work? Which GTK menu accelerator does not work? Any suggestions for better icon for save&quit?
I need more details to work with this.