[stable, beta] Some fixes

Improvements

• GMS1 room creation codes can now be edited/searched
• Arrow functions are now displayed in Outline View

Fixes

• Fixed wrong script colors in default dark themes
  (caused by adding the highlight setting in the previous release)
• Fixed “view object information” not working with slightly-malformed (e.g. missing references) objects
• Fixed linter seeing !a ? b : c as !(a ? b : c)
• Fixed file change check not working for Extension API viewer
• Functions/constructors are now separate types
  A constructor is a function, but a function is not a constructor.
  This fixes some oddities with storing constructors in local/static variables
• Fixed some actions that require file deletions failing
  A typo (well, wrong variable) from my recent changes aiming to finally have project file operations properly use memory cache when enabled.