correctly set current image state on new dir load

main.go

@@ -92,9 +92,14 @@ func newBrowse(file string) {
 		return
 	}
 	directoryState.images = []string{}
+	i := 0
 	for _, v := range dirfiles {
 		if filetypes.IsImage(v) {
 			directoryState.images = append(directoryState.images, v.Name())
+			if filepath.Join(directoryState.dir, v.Name()) == file {
+				directoryState.i = i
+			}
+			i++
 		}
 	}
 	updateImage(file)