Filtering branches in the sidebar doesn't work for branch names with a slash

System:

SourceTree: 4.2.2 (250)
macOS: 13.2.1

Problem

Looks like filtering with branch names with slashes doesn't work properly.

Given remote branches:

```

main
feature/some-description-here
fix/some-fix-here

```
Searching for `fix/some-fix-here` in the Filter input at the bottom hides all branches.

Expected

Should have filtered out everything except the `fix/some-fix-here` branch.

Actual

All branches are hidden.