Alternative fine browsing mode on Safari

[dascritch]

Event delegation not standardly occuring.
May be I should add a listener out of contextmenu. So bad, because it was so simple and elegant

[dascritch]

Most of the recipes is to recreate a timer listener. But this is interesting Leaflet/Leaflet#6817 then https://bugs.webkit.org/show_bug.cgi?id=202143 . As we use pointer events for the throbber, I have to re-emulate the contextmenu event. I had it, but removed.

So sad... it was leaner

	// throbber management
	const timeline_element = elCPU.shadowId('time');
	timeline_element?.addEventListener('pointerenter', trigger.hover, passiveEvent);
	timeline_element?.addEventListener('pointermove', trigger.hover, passiveEvent);
	timeline_element?.addEventListener('pointerout', trigger.out, passiveEvent);
	// alternative fine navigation for handhelds
	timeline_element?.addEventListener('contextmenu', () => {elCPU.showHandheldNav();});