Game Object/UI/Buttons - RTL Always Create the button in the child of Canvas.

[AnkitTorenzo]

This is not as big of an issue compare to others that've seen for this project.

The Problem

Let's say you have a screen and you want to add an RTL-TMP Button. You select a Game Object to be it's parent and from the Game Object>UI you select Button-TRLTMP. I except that the button will be created as a child of the selected Game object, and what I see is that the button is created as a direct child of the canvas. It get annoying very fast especially for a lazy person like me.

Diagnostics

The problem I found is in the ContextMenu.GetOrCreateCanvasGameObject(). As the name suggest It does gives you back a Game Object With Canvas component in it. But this same function is also been used for finding a parent for the Button RTLTMP. And there lies the issue. Since this method return a Game Object with Canvas component, this is what the code assigns as a parent for the button.

Than there is another question this method is also been used in ContextMenu.PlaceUIElementRoot(). But here we are already checking is the selected Game Object has a Canvas somewhere in it's parent or not. And what we want here is a Canvas in-fact any canvas would work because the user did not selected any of the children of a canvas.

Conclusion

This "Button are not being placed as a child of my selected object" really annoyed me, because I am lazy and did not wated drag the button all the way to my desired GO's child. So I fixed it.

I couple of days I will create a PR after clearing out all the Debug.Log()s and some other small things as well. One more thing that I would like to point out that Current behaviour of creating an object is not completely align with Unity's way of doing this. I am also considering fixing that as well. But I will raise a separate PR for that.