Theme colors selector practically impossible to scroll on Windows

[qu1ck]

Describe the bug
On Windows the theme colors ribbon is impossible to scroll unless you remember that shift+scroll does a horizontal scroll.
I didn't even know that there are more colors until I tried the android version and tried to scroll there.

To Reproduce
Go to settings -> appearance. Try to scroll to the right

• no scrollbar
• drag does not work
• ???
• Remember shift+scroll

Expected behavior
It should be more intuitive for the user to see that

1. There are more colors to the right
2. How to scroll to the right

A prominent scrollbar would accomplish both.

Screenshots
If applicable, add screenshots to help explain your problem.

Device information (Server)

• Tachidesk version: v1.0.0-r1498
• Server Operating System: docker image
• Server Desktop Environment: N/A
• Server JVM version: bundled with docker image

Device information (Client)

• Client version: 0.5.23
• Client Type: Windows (probably linux too)
• Client Operating System: Windows 10
• Client Specifications: pc

[DattatreyaReddy]

You can use tab to go to next theme.
ill try to add scroll bar in next release

[marimo-nekomimi]

I wasn't sure if I should post this here, but the same problem is happening in the Library category tab.