Search Highlighter only highlights first occurence in the same label

Steps to reproduce:

1. Open URP or HDRP Render Graph Viewer

2. Go To Resource List or Pass list Search Text Input

3. Search for "a"

Actual results: Only first char "a" on the Label is highlighted

Expected results: All the occurences on the same string are highlighted.

Reproducible with versions: 2023.3

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes:

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