Fix being unable to select imported objects

src/main.js

@@ -3332,6 +3332,7 @@ class GraphicsObject {
       }
       if (mode == "select") {
         for (let item of context.selection) {
+          if (!item) continue;
           if (item.idx in this.currentFrame.keys) {
             ctx.save();
             ctx.strokeStyle = "#00ffff";
@@ -5663,6 +5664,8 @@ function outliner(object = undefined) {
           outliner.collapsed[object.idx] = !outliner.collapsed[object.idx];
         } else {
           outliner.active = object;
+          // Only do selection when this is pointing at the actual file
+          if (outliner.object==root) {
             context.objectStack = []
             let parent = object;
             while (true) {
@@ -5682,6 +5685,7 @@ function outliner(object = undefined) {
             context.shapeselection = []
             actions.select.create()
           }
+        }
         updateOutliner(); // Re-render the outliner
         return;
       }