June cleanups before friday

[itsjunetime]

• Fix display of tab list to show which one is selected
• Make a way to get back to main tab
• Add gunzipping
• Make response body display prettier and scrollable
• Add error box in middle for communication to users
• Edit tab names
• Fix session saving functionality
• Open request notes in system editor
• Add basic filter with / input

[itsjunetime]

So, the session saving is gonna be difficult. A few reasons:

1. Our current Request struct stores a oneshot::Sender, which can't be serialized/deserialized. Using the message passing model makes things easier at runtime, but will make it harder to save/restore
2. We currently store a ListState (from ratatui) to track the current index in the request list, but that is also not (de)serializable. We could just use like a Option<usize>, but then we'd have to create a new ListState on every redraw, which would be annoying
3. Hyper's Request and Response are not (de)serializable. I kinda have to work around this kinda stuff already so we can do gunzipping, but it'll still make it a bit more annoying. Maybe this'll be fixed by hyper 1.0, maybe not. who knows.

[itsjunetime]

I think I'll also hold off on adding the filter as well until I figure out what the move is for the session since I'm not sure where it should be stored

[joshka]

We currently store a ListState (from ratatui) to track the current index in the request list, but that is also not (de)serializable. We could just use like a Option<usize>, but then we'd have to create a new ListState on every redraw, which would be annoying

This is fixed in ratatui/ratatui#723 (which is available on the alpha release, and will be available in 0.26.0 sometime soon)