Quick open scene should favor beginning of the name

[KoBeWi]

Godot version

3.4 beta / 3c21fc5

System information

W10

Issue description

This has bothered me for a while and I have a concrete example that illustrates the problem:

I wanted to open the Workshop.tscn, which is 5th result on the list, even though I searched for it specifically. This is similar problem to #21726. The results should be sorted by relevance, i.e. better match near the beginning, instead of just alphabetically.

Steps to reproduce

1. Have e.g. Workshop.tscn and IconWorkshop.tscn
2. Try to quick open Workshop.tscn

Minimal reproduction project

No response

[KoBeWi]

Seems like it's only relevant to 3.x. On master there is a nice _score_path() method, so we could just backport it.