IDE: [Particle System Editor] Add checkboxes for global space particle system and relative particle emitters

[yoshikins]

Is your feature request related to a problem?

Not really a problem, but I do think that if you can change a property of something at runtime, you should be able to do it in the IDE as well, you also shouldn't be forced to do it at runtime because the IDE features aren't up to date.

Describe the solution you'd like

Add checkboxes to the Particle System Editor to account for the functionality brought about by the function part_system_global_space() and part_emitter_relative()

Describe alternatives you've considered

N/A

Additional context

It could look like this.

[mmMarzban]

It would be very good to implement this feature.

[tgalluzzo]

This is an important feature. This is preventing the ability to use global particle systems in the sequence editor. The only alternative is to create a custom object with the procedural settings for a global particle system and then use that object in the sequence editor to get the desired particle effect.