Suggestion: Use the same syntax highlighting as GDScript in Godot throughout the application

Suggestion from a user received via email. Currently, the colors across the application for syntax highlighting are not always consistent. We could use the same syntax highlighting as GDScript in Godot throughout the application, with one centralized theme. I need to double check, but the code editor may do it out of the box. The fact that we use different colors is a remnant of older versions of the application.

Start by locating the syntax-highlighting and theme definitions used across the application, then compare them with Godot's GDScript editor colors. Confirm which views use separate color schemes and define done as one consistent GDScript-style theme applied throughout the application.

Written by the indexing model from the issue text.