add shortcut key to go up directory level

src/lib/components/xp/ContextMenu.svelte

@@ -38,7 +38,7 @@
 
         } else if(type == 'RecycleBin'){
             menu_obj = (await import('./context_menu/RecycleBin')).make({type, originator});
-            
+
         } else {
             console.log('unknown context menu type')
         }

src/routes/xp/programs/my_computer.svelte

@@ -224,7 +224,7 @@
         page_index = Math.min(history.length - 1, page_index + 1);
     }
 
-    function up(){
+    export function up(){
         let parent_id = $hardDrive[history[page_index]].parent;
         open(parent_id);
     }

src/routes/xp/programs/my_computer/viewer.svelte

@@ -172,11 +172,11 @@
     }
 
     function on_keydown(e){
-        console.log('keyevent in my computer');
+        
         if(my_computer_instance.window.z_index != $zIndex) return;
         if(renaming) return;
         if(id == null) return;
-        console.log('not skip');
+        console.log('keyevent in my computer');
 
         if(!(e.ctrlKey || e.metaKey)) return;
         if(e.key == 'c'){
@@ -188,6 +188,10 @@
         } else if(e.key == 'a'){
             let els = node_ref.querySelectorAll('.fs-item');
             ds.setSelection(els, true);
+        } else if(e.key == 'ArrowUp'){
+            e.preventDefault();
+            my_computer_instance.up();
+
         }
     }