Added the smart word wrap property to preview label in batch rename dialog

[nsrCodes]

closes #52074

batch-rename.mp4

[nsrCodes]

The mentioned bug is fixed but this raises another problem that the height of the label does not shrink after the label is resized (when each new line is added).
I was expecting this to be covered in another issue because it has to do with the minimum_size_changed function in control.cpp. AFAIU, it does not resize the node if its children are still inside, which leaves the empty gaps

Demo of the new issue:

batch-rename-new-glitch.mp4

[nsrCodes]

The mentioned bug is fixed but this raises another problem that the height of the label does not shrink after the label is resized (when each new line is added).

This bug already exists in master. You can check the same by just toggling the advanced options, it does not resize correctly.

[LoipesMas]

Here's how it looks on current master:

batch_rename2.mp4

The original issue (text getting out of the window) isn't there. It's only on 3.x branch.
I'm not sure if cherry-picking this PR for 3.x would fix that.

Maybe make a separate PR for 3.x to fix size not updating and another one for master to set the autowrap (or just use this PR for that, just changing the title).

[nsrCodes]

I have found the reason of the bug in master but currently can't find a way to fix it.
Before #37317 the dialog was implemented using control and there if we set the value of size.y to 0 (which is done while toggling the advanced option button), the size computed for the re-render was equal to the minimum size required to fit the children of that dialog (follow the get_combined_minimum_size function in _update_minimum_size).

But after that PR, dialogs are now implemented using window where the _update_window_size does not let the window shrink back. This is because along with the minimum size of the window, it also tracks the dynamically updated window size and always chooses the max of the two.

[akien-mga]

Thanks! And congrats for your first merged Godot contribution 🎉

[akien-mga]

Cherry-picked for 3.5.

[akien-mga]

Cherry-picked for 3.4.3.