Unable to drag to enlarge 'Query Variables' section/region

### Expected Behavior

Used to be able to drag to enlarge 'Query Variables' section/region

### Actual Behavior

Unable to drag to enlarge 'Query Variables' section/region

### Reproduction Steps

1. Launch the insomnia
2. You cannot use the mouse to drag that line to enlarge the Query Variables section.
3.

### Is there an existing issue for this?

- [X] I have searched the [issue tracker](https://www.github.com/Kong/insomnia/issues) for this problem.

### Additional Information

_No response_

### Insomnia Version

2023.2.2

### What operating system are you using?

macOS

### Operating System Version

macos 12.3

### Installation method

homebrew

### Last Known Working Insomnia version

_No response_

No source file or test is named in the report. Reproduce the problem in Insomnia 2023.2.2 on macOS, then trace the Query Variables region and its resize interaction; the work is done when the divider can again be dragged to enlarge that section.

Written by the indexing model from the issue text.