Bug 1599: Local directory tree cannot be controlled using keyboard

https://winscp.net/tracker/1599

Source commit: ae5c2ea621965c7e42b6b69d39ff326a1c822f6c

source/forms/ScpCommander.dfm

@@ -1620,6 +1620,7 @@ inherited ScpCommanderForm: TScpCommanderForm
       WatchDirectory = True
       DirView = LocalDirView
       OnRefreshDrives = LocalDriveViewRefreshDrives
+      OnBusy = DirViewBusy
       OnDDDragEnter = LocalFileControlDDDragEnter
       OnDDDragLeave = FileControlDDDragLeave
       OnDDDragOver = LocalFileControlDDDragOver

source/packages/filemng/DriveView.pas

@@ -326,6 +326,7 @@ type
       write FOnDisplayContextMenu;
     property OnRefreshDrives: TNotifyEvent read FOnRefreshDrives
       write FOnRefreshDrives;
+    property OnBusy;
 
     property DDLinkOnExeDrag;