feature(key) add ability to pack files with Alt + F5

Author: coderaiser

HELP.md

@@ -135,6 +135,7 @@ Hot keys
 | `F4`                  | edit
 | `Shift + F4`          | edit in `vim` mode
 | `F5`                  | copy
+| `Alt` + `F5`          | pack
 | `F6`                  | rename/move
 | `F7`                  | new directory
 | `Shift + F7`          | new file

client/key.js

@@ -311,6 +311,8 @@ function KeyProto() {
         case Key.F5:
             if (ctrlMeta)
                 CloudCmd.sortPanel('date');
+            else if (alt)
+                Operation.show('pack');
             else
                 Operation.show('copy');