Fixes #608 make exclusive more configurable on wayland

[viandoxdev]

Description

Changes the exclusive property on wayland to allow for another option: ignore

Usage

  :exclusive "exclusive" ; reserve space
  :exclusive "normal" ; default behavior
  :exclusive "ignore" ; don't move window if occluding another

Additional Notes

Not a fan of the names exclusive, normal, ignore, :exclusive "exclusive" looks weird and they're not really explicit.
Pretty sure this count as a breaking change too.

Checklist

• All widgets I've added are correctly documented.
• I added my changes to CHANGELOG.md, if appropriate.
• The documentation in the docs/content/main directory has been adjusted to reflect my changes.
• I used cargo fmt to automatically format all code before committing

[elkowar]

Yea, having the breaking change here is kind of annoying... I'd love to either include this in a release that already includes other breaking changes, or make it not break the current format. Any ideas as to how you could implement this without breaking backwards-compatibility?