feat(file-select): Queueing transfers

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/ui/activities/filetransfer/components/log.rs

@@ -166,6 +166,12 @@ impl Component<Msg, NoUserEvent> for Log {
                 self.perform(Cmd::Move(Direction::Up));
                 Some(Msg::None)
             }
+            Event::Keyboard(KeyEvent {
+                code: Key::Right, ..
+            }) => Some(Msg::Ui(UiMsg::BottomPanelRight)),
+            Event::Keyboard(KeyEvent {
+                code: Key::Left, ..
+            }) => Some(Msg::Ui(UiMsg::BottomPanelLeft)),
             Event::Keyboard(KeyEvent {
                 code: Key::PageUp, ..
             }) => {