Feature request: "Share <url>..." selection menu action

As a followup to #529 where I asked to be able to choose an alternate browser for the "Open ..." action:

There is an app: [Opener](
https://www.opener.link/) (proprietary, costs $1.99 at time of writing), which enables a "Share" item that, when tapped, pops up a list of candidate apps. This is primarily for mobile-app launching from desktop URL's, like YouTube, but you can give it your preferred browser (in my case, Chrome) as an always-available fallback option.

So I think instead of this feature request, perhaps an even more useful one would be a "Share ..." choice in the pop-up selection menu. This would enable not only opening other browsers, but opening other iOS-native apps like YouTube, Facebook, etc.

Start by tracing the existing "Open ..." selection menu and reviewing issue #529, since no implementation files or tests are named here. Done means the menu offers a "Share ..." action that opens the iOS share or app-selection interface for the selected URL.

Written by the indexing model from the issue text.