[Bug] Clicking outside of <p> elements doesn't close popup

[turshija]

For example I highlight a text in elements I've chosen, popup shows and if I click outside (for example on background), text gets de-selected but popup remains.

[neuedeutsche]

yup noticed that too, needs a more general close event.

[dandv]

Screencast

[dandv]

Fixed in my fork of SelectionMenu that addresses a few other issues from selection-sharer and makes it general-purpose (i.e you can put anything you want in the menu).