Add Render Button Right

[ZHamburglar]

No description provided.

[jakezatecky]

Hello @ZHamburglar and thank you for the PR!

I have reviewed the changes and have run the examples. Everything seems to be fine. However, this PR adds a lot of additional changes to the code base when I think this display change could best be implemented in a user's code.

For example, I think the following CSS-related changes would achieve the same thing this PR accomplishes:

.rct-collapse {
  order: 1;
  margin-left: auto;
}

Would such a CSS change be usable under your use case? The reason I ask is because there are a lot of properties and tested elements already in this library and I want to reduce maintenance burden when some things can be done by users of the library with minor changes.