Apply line height when change to value is made

[austincondiff]

Description

Currently there is no change when the line height setting is changed, you had to reopen the file. This PR fixes that to apply the new value when it is changed.

Checklist

• [x] I read and understood the contributing guide as well as the code of conduct
• [x] The issues this PR addresses are related to each other
• [x] My changes generate no new warnings
• [x] My code builds and runs on my machine
• [x] My changes are all related to the related issue above
• [x] I documented my code

Screenshots

https://user-images.githubusercontent.com/806104/234170447-b8a1b481-dd05-4f88-86b2-821ce37cb831.mp4