Add follow link to terminal link hover

[Tyriar]

See #69719 (comment)

Related #73035

[CTimmerman]

From #73035:

This feature is already implemented in the DEBUG CONSOLE panel.

Navigating to /home/cees/code/test/server.js:20 via de debug console only works for me when using both hands, one holding Ctrl.

Version: 1.39.2
Commit: 6ab5985
Date: 2019-10-15T15:33:40.634Z
Electron: 4.2.10
Chrome: 69.0.3497.128
Node.js: 10.11.0
V8: 6.9.427.31-electron.0
OS: Linux x64 4.15.0-1059-oem snap

[jmbockhorst]

@Tyriar To be able to hover over the widget so it can be clicked, we need to not hide it up if the mouse is over it. Currently, the leaveCallback doesn't pass any MouseEvent back, so there's no way to check. Is there a better solution? Or does leaveCallback in xterm need to be updated to pass back a MouseEvent?

[Tyriar]

@jmbockhorst we have some freedom here as the widget is owned by VS Code. Maybe the widget could listen for mousemove while it exists and we only hide it on leaveCallback if a mousemove event hasn't happened on the tooltip element?

[jmbockhorst]

@Tyriar I tried doing something like this, but the leaveCallback is fired before a mousemove or mouseenter is fired for the widget.