Directories sizes in details view (#656)

* translations

* folder size in details view

* dir size subscription

* waldir instead of recursion

* opitonal size with calculating label waiting for subscription

* removed not necessary code

* Bug fixes

---------

Co-authored-by: Jeremy Soller <jackpot51@gmail.com>

src/mounter/gvfs.rs

@@ -135,6 +135,7 @@ fn network_scan(uri: &str, sizes: IconSizes) -> Result<Vec<tab::Item>, String> {
             selected: false,
             highlighted: false,
             overlaps_drag_rect: false,
+            size: None,
         });
     }
     Ok(items)