Add tree filtering to Advanced Import Settings

[jeronimo-schreyer]

implements node filtering in the scene import settings dialog

Updates
scene_import_settings.cpp
scene_import_settings.h

• Bugsquad edit: This closes Add node tree filter/search to Advanced Import Settings godot-proposals#6764.

[fire]

Is this tree filtering or light previewing?

[jeronimo-schreyer]

I assume your question is about whether the filtered nodes are then imported into the project. In that case, yes, this only responds to a "visual" filtering of the scene tree.

[romgerman]

Is this PR dead? Would really help when importing modular 3d models (one big file with hundreds of models).

[jeronimo-schreyer]

Closing this PR in favor of
#117826