fix: Misaligned Caret and selection box for EditText + refactor SpriteFont glyph drawing logic

[Eideren]

PR Details

See title, fairly self explanatory.


Refactor came out both as a way to understand how font is drawn to figure out what was wrong, but also to improve throughput and fix some of the edge cases that came with the discrepancy in behavior between the different fonts.

Also changed the default selection color to look blue-ish instead of white; the text is already white by default, white on white isn't readable.

Related Issue

fix #2513

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built and run the editor to try this change out.