unable to resize the Request Body window in the new Graph Explorer UI

[HAL377]

Describe the bug
We have an updated Microsoft Graph Explorer UI now (not sure I like it though) but its quite annoying I can no longer resizee the "Request Body" window part. It now takes up more then half of the screen now and makes it difficult to work with the actual results of the graph requests we do.

To Reproduce
Go to https://developer.microsoft.com/en-us/graph/graph-explorer
you land on "Request Body" which now takes more then half of the screen and cannot be resized.

Expected behavior
use a smaller size for the "Request Body" by default and/or allow to resize that part of the window (as it did before)

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Edge
• Version: 135.0.3179.66 (Official build) (64-bit)

[ElinorW]

similar to #3778