Expand one layer by default to make IDA navigation easier.

capa/ida/explorer/view.py

@@ -59,12 +59,13 @@ class CapaExplorerQtreeView(QtWidgets.QTreeView):
         called when view should reset any user interface changes
         made since the last reset e.g. IDA window highlighting
         """
-        self.collapseAll()
+        self.expandToDepth(0)
         self.resize_columns_to_content()
 
     def resize_columns_to_content(self):
         """ reset view columns to contents """
         self.header().resizeSections(QtWidgets.QHeaderView.ResizeToContents)
+        self.expandToDepth(0)
 
     def map_index_to_source_item(self, model_index):
         """map proxy model index to source model item