Make toggling utility area maximization smooth

[xyzqm]

Description

Before:

https://github.com/CodeEditApp/CodeEdit/assets/65467530/3cb0d3da-15bb-4808-a442-c1a1477dcee2

After:

https://github.com/CodeEditApp/CodeEdit/assets/65467530/2c380fd7-82ef-41c8-95e4-1c934ad3e009

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

[xyzqm]

Hm, I can't seem to reproduce:

https://github.com/CodeEditApp/CodeEdit/assets/65467530/2ae7d12d-5f4e-4694-93e6-bedfbfde8925

This is after quitting and reopening, without touching anything else other than the top edge of the window.

[xyzqm]

Oh nevermind, I'm seeing it now too...will see if there's an easy fix 😓

[xyzqm]

While debugging this I discovered a new issue (both on this branch and on main as well):

https://github.com/CodeEditApp/CodeEdit/assets/65467530/29eb4598-1287-42ab-9871-14da1cdef81c

The bottom of the window gets forced down when maximizing the utility area for some reason, after it's been minimized and reopened...

This issue also occurs sometimes even without minimizing/reopening, but I can't find reliable ways to repro them.

[xyzqm]

The issue you noted earlier should be resolved now, but the issue I commented on above still stands; any ideas perhaps on how to fix it/what could be causing it?