RichTextLabel's [center] and [right] are still broken

[ghost]

Godot version:
269145a
OS/device including version:
ArcoLinux
Issue description:
There seems to be a misconception in what's expected of RichTextLabel's [center] and [right] tags. When the user attempts to center-align their text, for example, what they're looking for is precisely what Godot's label does:

This expectation is also supported by this BBCode tester https://infinite-story.com/tools/bbcode.php

When the RTL centers text, however, it winds up looking like this:

It centers the entire block of text to the middle of the control, but doesn't actually center-align. The user wants to center-align, not center the entire contents.

[right] also suffers this same issue:

[right]This is a test. This is only a test.  This is a test. This is only a test.  This is a test. This is only a test.  This is a test. This is only a test.  This is a test. This is only a test.  This is a test. This is only a test.[/right]

For contrast, here's what the BBCode tester outputs:

According to #29785 , #6982 is fixed, but it seems to fix a problem that doesn't actually exist, or missed the point of the issue being raised. The tags are expected to center-align and right-align the text itself, just like Label, and just like the BBCode tester, not shift the entire contents towards the center or the right while keeping the text alignment left.

[TheDuriel]

possibly related to #31089 and #30632 and #27896 and #24570 and #24305

so yeah, someone plz nuke this node and rewrite it :D

[Capital-EX]

Chiming in to say that this is still an issue with 3.2. It seems like Godot doesn't properly handle line wrapping:

Hopefully this will be fixed one day, especially since Godot recently added text effect to the RTL node. But, in its current state, it is unusable.

[Nolkaloid]

If I try to nuke it and rewrite it, do we care about backwards compatibility? Or should I just try to patch it here and there UwU?

[Janglee123]

@Nolkaloid I think for 4.0, there are already lots of changes to break compatibility. But for 3.2, patches should be better.

[Poobslag]

Godot 3.2 still has problems with wrapping centered text, including this weird edge-case where it overlaps itself. The RichTextArea is tall enough to accommodate four rows of text, and additional rows cause a scroll bar. But, sometimes the textarea will just plop a word on top of other words.

[Anutrix]

Can we close this if it's fixed by #39164?

[Calinou]

This bug was confirmed to be fixed by @pouleyKetchoupp in #39164 (comment), closing.