Fix 7 GUIs crud example for delete when filtered

This example could delete the incorrect person when a filter was applied. Just an example, but the behavior was confusing when I played with it, so I thought it worth fixing.

site/content/examples/19-7guis/05-7guis-crud/App.svelte

@@ -43,10 +43,12 @@
 	}
 
 	function remove() {
-		people = [...people.slice(0, i), ...people.slice(i + 1)];
+		// Remove selected person from the source array (people), not the filtered array
+		const index = people.indexOf(selected);
+		people = [...people.slice(0, index), ...people.slice(index + 1)];
 
 		first = last = '';
-		i = Math.min(i, people.length - 1);
+		i = Math.min(i, filteredPeople.length - 2);
 	}
 
 	function reset_inputs(person) {