Store other/custom window state details (e.g. URL)

[philfreo]

Does it make sense for this library to also store other window state? For example if each window is a BrowserWindow with a specific URL loaded, then when windows are restored, it would be nice to restore each to view the previous URLs too, similar to how Chrome works.

Please let me know if you think whether this is in-scope for this project. I see two similar projects (electron-window-state-manager and electron-window-plus) that do look like they could support custom values like this, though I haven't tried them... and I'm already using yours.