### Godot version

4.x

### System information

Windows 10

### Issue description

The `Search Result` panel is not correctly updated when changing the theme.

https://user-images.githubusercontent.com/66004280/208964493-d0423b78-3418-44c9-95ed-822fd34c4720.mp4



### Steps to reproduce

1. Search something
2. Change the theme

### Minimal reproduction project

--
Ref<FileAccess> f = FileAccess::open(fpath, FileAccess::READ);
	ERR_FAIL_COND_MSG(f.is_null(), "Cannot open file from path '" + fpath + "'.");
	String buffer;
	int current_line = 1;
	ConservativeGetLine conservative;
	String line = conservative.get_line(f);
	String search_text = _finder->get_search_text();
	int offset = 0;