Edit location when clicking on current directory

This makes it so clicking on the name of the current directory (the last
item) in the breadcrumbs puts it into edit mode. Before, it wouldn't do
anything, because you're already in the dir. Now it does something useful. This
change matches the behavior of Gnome Files.

src/tab.rs

@@ -3874,7 +3874,11 @@ impl Tab {
                         widget::button::custom(row)
                             .padding(space_xxxs)
                             .class(theme::Button::Link)
-                            .on_press(Message::Location(location.clone())),
+                            .on_press(if ancestor == path {
+                                Message::EditLocation(Some(self.location.clone().into()))
+                            } else {
+                                Message::Location(location.clone())
+                            }),
                     );
 
                     if self.location_context_menu_index.is_some() {