EditMenu: differentiate external widgets from Cockpit's own #3046

Job	Run time
Test	1m 3s
deploy-blueos-extension	1m 5s
deploy-flatpak (ubuntu-latest, linux, x86_64, flatpak)	7m 52s
deploy-cloud	0s
deploy-flatpak (ubuntu-24-arm, linux, arm64, flatpak)	10m 19s
deploy-electron (macos-13, mac, x64, dmg, latest-mac.yml)	5m 31s
deploy-electron (ubuntu-latest, linux, x86_64, AppImage, latest-linux.yml)	2m 36s
deploy-page	48s
deploy-electron (ubuntu-24-arm, linux, arm64, AppImage, latest-linux-arm64.yml)	9m 52s
deploy-electron (windows-latest, win, x64, exe, latest.yml)	6m 45s
	45m 51s

Provide feedback