host details: increase variables window

[aeter]

SUMMARY

Increase the 'variables' window tallness at host details page.

ISSUE TYPE

• Bug, Docs Fix or other nominal change

COMPONENT NAME

• UI

AWX VERSION

ADDITIONAL INFORMATION

When hosts have variables, they may have lots of them. The current window was only 4 rows tall. By making it taller,
it's easier to read it immediately (also to scroll, etc.)
I know there is a "fullscreen" button at the top right. This change makes it easier to not have to click it every time, for every host. Attaching screenshot how it looks now with only 2 variables, for comparison

ran the below commands

npm run prettier
npm run lint
npm run test