Improve hover tooltip on top-level call stack nodes

[sbj42]

When the sidebar is narrow, some strings are cut off in the Call Stack panel. Top-level nodes in that tree get ellipses, but the hover tooltip on them is a different string entirely. This is an issue in the built-in JavaScript debugger, but also potentially in other debuggers, including vscode-java-debug where I initially submitted this issue.

Please allow the tooltip for those items to include the truncated text.

For instance, in vscode 1.66.0-insiders with extensions disabled, see the following screenshot:

The top-level node label would be Launch Program: test.js [1724], but is truncated to L.... The hover tooltip text is just Paused on breakpoint. My request is that Launch Program: test.js should be included in the hover text somehow.

The problem is worse in the vscode-java-debug extension:

In Java there can be many threads, and the names of those threads is useful information, but the hover tooltip does not help because it merely says Thread. @testforstephen says that vscode is showing the "node kind" as the tooltip. It sounds like the vscode-java-debug extension needs better control over the tooltip text in the vscode API.

[roblourens]

I think the "paused on breakpoint" label comes from the debug extension, but I think we could include the session name too. And I don't see why we wouldn't use the whole Thread name. Any reason not to do that @isidorn?

[isidorn]

"Paused on" is coming from here https://github.com/microsoft/vscode/blob/main/src/vs/workbench/contrib/debug/browser/callStackView.ts#L878
Currently it is probably re-used between hover and title area label (when there is just one session).
So I think if there are multiple sessions the label should contain the session name.

Yeah I think using the full thread name is better on hover.