Expand the theme selector under preferences

[RippieUK]

Expected Behavior

When going into preferences under the Editor tab, I can see 1,5 line for the themes i can select. I would have expected to see this expanded or at least add a scrollbar

Current Behavior

I can only see 1,5 line and yes i can scroll, but there is no actual scrolling bar as a visual clue.

Possible Solution

Expand the theme selector area so its visible there are more than 1,5 theme :)

Screenshots of the Problem

Your Environment (for bugs)

Linux LXLAP 5.3.0-51-generic #44~18.04.2-Ubuntu SMP Thu Apr 23 14:27:18 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
NAME="elementary OS"
VERSION="5.1.4 Hera"
ID=elementary
ID_LIKE=ubuntu
PRETTY_NAME="elementary OS 5.1.4 Hera"
LOGO=distributor-logo
VERSION_ID="5.1.4"
HOME_URL="https://elementary.io/"
SUPPORT_URL="https://elementary.io/support"
BUG_REPORT_URL="https://github.com/elementary/os/issues/new"
PRIVACY_POLICY_URL="https://elementary.io/privacy-policy"
VERSION_CODENAME=hera
UBUNTU_CODENAME=bionic

• Notes-Up Version: From release
• OS Info: Elementary OS 5.1