Quitting from the Dock menu (or logging out, or an agent's ui.quit) while
another app is in front opens "Save changes?" in a window the user can't see,
so it looked as if PdfCraft hadn't quit. The prompt now sends a critical
user-attention request on the frame it opens while the window isn't focused:
the Dock icon bounces until PdfCraft is active, the Windows taskbar button
flashes until the window is in front, and X11 sets the urgency hint. Coming
back, or answering, sends Reset. This is what AppKit does by itself when an
inactive app presents a modal panel; PdfCraft's prompt is drawn by egui, so
AppKit never sees it.
Eric Kaden
00a7d5b887