Reload of page/window doesn't reload the help pane

[jonvanausdeln]

System details:

Positron and OS details:

Positron:

Positron: 2024.12.0-48
Workbench: 2024.12.0+440.pro1

Interpreter details:

Python 3.10.10

Describe the issue:

Similar to #3172

Reloading the page/tab does not reload the help pane

*note - this occurs in both workbench and desktop positron

Screen.Recording.2024-11-20.152021.mp4

Steps to reproduce the issue:

1. Load a new Positron workbench session
2. Execute help in R, e.g. ?library()
3. Observe help pane is populated
4. Reload the tab/window

Expected or desired behavior:

Help to still show in the help pane.

Were there any error messages in the UI, Output panel, or Developer Tools console?

[jmcphers]

Since the contents of the Help pane are generally loaded from an active R or Python session, the "current help pane URL" could be stored in the ephemeral storage added in #5372.