Skip over non-CanvasItem parents when selecting texture filter properties.

[bruvzg]

Fixes #113872

Instead of checking only direct parent, look deeper for the first encountered grandparent CanvasItem when selecting inherited texture filter/repeat, so it will over for subwindows and nodes inside non-CanvasItem parents.

[scgm0]

Will this invalidate the texture filter/repeat settings on the subwindows?

[bruvzg]

Will this invalidate the texture filter/repeat settings on the subwindows?

This might indeed be wrong, I have not noticed Viewport already have its own texture filter settings.

[scgm0]

Perhaps inheritance functionality should also be added for settings such as texture filters on the Viewport.

[bruvzg]

Superseded by #117139