fix kiss-vscode multi-keystroke shortcuts

projects/kiss-vscode/config/KissConfig.kiss

@@ -111,13 +111,13 @@
                 (.dispose (the WebviewPanel shortcutPanel))
                 (set shortcutPanel null))
             (set prefixMap commandShortcuts))
-        (unless shortcutPanel
+        (when shortcutPanel (shortcutPanel.dispose))
         (set shortcutPanel (Vscode.window.createWebviewPanel 
                                                 "kissShortcut"
                                                 "Kiss Shortcuts"
                                                 vscode.ViewColumn.Two
                                                 (object
-                                                        enableScripts true))))
+                                                    enableScripts true)))
         (let [&mut keyListener null]
             (set keyListener (shortcutPanel.webview.onDidReceiveMessage
                                     ->key (if (prefixMap.exists key)