Expand buttons

[Odonno]

Is your feature request related to a problem? Please describe.

Like the network tab, we could make use of expand/collapsible buttons:

• for request/response headers section
• for sections on RequestView (Query, Variables, Extensions)

Describe the solution you'd like

Example of the network tab:

[warrenday]

Like this idea, would be great in cases the query string is huge.