Rename get_ok() and get_cancel() to get_ok_button() and get_cancel_button()

[me2beats]

Describe the project you are working on

plugins

Describe the problem or limitation you are having in your project

there's get_ok() in AcceptDialog
there's get_cancel() ConfirmationDialog
there's get_close_button() in AcceptDialog.
That sounds inconsistent.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Renaming some of this methods would make API more consistent (in terms of naming).

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

There are two options:

1. Rename get_close_button() to get_close()
2. Rename get_ok() and get_cancel() to get_ok_button() and get_cancel_button()

I prefer (2), this makes the names of these methods clearer.

If this enhancement will not be used often, can it be worked around with a few lines of script?

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Is there a reason why this should be core and not an add-on in the asset library?

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[YuriSizov]

This was already tracked in godotengine/godot#16863 and implemented for master in godotengine/godot#44389.