Refactor: Remove .call() in EventDispatcher

[nidble]

===:clipboard: PR Checklist :clipboard:===

• 📌 issue exists in github for these changes
• 🔬 existing tests still pass
• 🙈 code conforms to the style guide
• 📐 new tests written and passing / old tests updated with new scenario(s)
• 📄 changelog entry added (or not needed)

==================

Closes #2047

Changes:

• EventDispatcher - doesn't require the target object. The context of this is not tampered anymore.
• PointerAbstraction - is fixed to maintain reference
• The following Engine's pieces: Collision Graphics Resources Trigger are updated to accomodate the new EventDispatcher behavior.

[eonarheim]

@nidble Thanks for the contribution! This is great!

[eonarheim]

I threw the hacktoberfest label on there, not positive they are still counting PRs, worth a shot 👍