[P3][Beta] Fix settings showing wrong number of window types

[MokaStitcher]

What are the changes the user will see?

Only 5 window types to choose from instead of 10

Why am I making these changes?

Messed up when trying to get the length of an enum in #419

What are the changes from a developer perspective?

use the utils function getEnumLength

Screenshots/Videos

Before/After

How to test the changes?

Settings > Display tab

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I tested the changes manually?

• Are all unit tests still passing? (npm run test:silent)
  • Have I created new automated tests (npm run test:create) or updated existing tests related to the PR's changes?
• Have I provided screenshots/videos of the changes (if applicable)?
  • Have I made sure that any UI change works for both UI themes (dark and light)?

Are there any localization additions or changes? If so:

[frutescens]

We should have 10 window types though