- for whatever reason, using directly the name of the object in a

QtGui.QStadardItem is creating issues in the tests. Converting it to a
string solve this. After solving the conflict in the pull request this
modification was lost so I am doing it again.
- the FlatCAMObj.FlatCAMGerber.isolate() method is having the line
app.obj.info() which randomly create issues due of using QPixMaps outside
of the GUI thread.

ObjectCollection.py

@@ -162,7 +162,7 @@ class ObjectCollection():
 
         # Create the model item to insert into the QListView
         icon = QtGui.QIcon(self.icons[obj.kind])  # self.icons["gerber"])
-        item = QtGui.QStandardItem(icon, name)
+        item = QtGui.QStandardItem(icon, str(name))
         # Item is not editable, so that double click
         # does not allow cell value modification.
         item.setEditable(False)