Scrollbar is too small (UX, a11y issue)

[runerune]

• The scrollbar in the main window is too small to grab with the mouse reliably. This is an a11y issue too.
• Scrollbar track is the same color as window background, failing to communicate where the active scrollbar area begins and ends.

To Reproduce

1. Open the main window.
2. Try to grab the scrollbar with your mouse.
3. Let the anger flow.

Expected behavior
Scrollbar should be larger and easier to grab. Scrollbar track should display a border to communicate where it begins and ends.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Version: 2.3.0

[ryanSN]

This is kinda done on purpose as it simulates a similar exp of the emoji picker on Mac. (Again this was built and designed before windows even has this native option).
note for self when working on: The code in main currently is a rewrite of this UI, so will need to double check if this is still a similar issue.