Allow copy-pasting fields of similar types

[LeXXik]

It would be nice to be able to copy-paste an entity or a model reference from one component to another, instead of searching those in the hierarchies.

If the components are on the same entity, simply drag and drop to copy would suffice (or even drag and hover). If the components are on different entities, perhaps a copy/paste button could be added to the field.

[willeastcott]

@jiajasper I was thinking a right-click context menu with Copy + Paste on the attribute labels would be an option here. Do you have any alternative suggestions here?

[yaustar]

Related tickets: #520, #216

[Maksims]

@jiajasper I was thinking a right-click context menu with Copy + Paste on the attribute labels would be an option here. Do you have any alternative suggestions here?

I was thinking on the same lines. As it allows to copy a complex fields e.g. vectors.

[Maksims]

We really want this, as it becomes more and more common for a need to copy things within larger projects.

Even the small (gradual) implementation, like to start with: strings, number, vec2, vec3, vec4 - would be a massive addition.