searchbar: fix scroll position for first item

Author: frauzufall

src/main/java/org/scijava/ui/swing/search/SwingSearchBar.java

@@ -528,7 +528,7 @@ private void select(final int i) {
 
 		private boolean isFirstNonHeader(final int index) {
 			assertDispatchThread();
-			for (int i = index; i >= 0; i--) {
+			for (int i = index-1; i >= 0; i--) {
 				if (!isHeader(result(i))) return false;
 			}
 			return true;