If an item does not have an expand/collapse latch, let the left arrow jump to its parent (if any). Implements ticket #3725.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30130 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/OutlineListView.cpp

@@ -153,8 +153,15 @@ BOutlineListView::KeyDown(const char* bytes, int32 numBytes)
 			case B_LEFT_ARROW:
 			{
 				BListItem *item = ItemAt(CurrentSelection());
-				if (item && item->fHasSubitems)
+				if (item) {
-					Collapse(item);
+					if (item->fHasSubitems)
+						Collapse(item);
+					else {
+						item = Superitem(item);
+						if (item)
+							Select(IndexOf(item));
+					}
+				}
 				return;
 			}
 		}