feat: 132 queuing transfers (#332)

the logic of selecting files has been extended!
From now on selecting file will put the files into a transfer queue, which is shown on the bottom panel.
When a file is selected the file is added to the queue with a destination path, which is the **current other explorer path at the moment of selection.
It is possible to navigate to the transfer queue by using `P` and pressing `ENTER` on a file will remove it from the transfer queue.Other commands will work as well on the transfer queue, like `COPY`, `MOVE`, `DELETE`, `RENAME`.

closes #132

src/system/keys/keyringstorage.rs

@@ -77,7 +77,7 @@ impl KeyStorage for KeyringStorage {
 #[cfg(test)]
 mod tests {
     #[test]
-    #[cfg(not(feature = "isolated-tests"))]
+    #[cfg(all(not(feature = "github-actions"), not(feature = "isolated-tests")))]
     fn test_system_keys_keyringstorage() {
         use pretty_assertions::assert_eq;
         use whoami::username;