Consider to evaluate application objects later in order to load faster

[AXbusiness]

Each axtAppObj gets immediately evaluated while being created in axtParserXpo.run().

Large projects could load faster if a background worker could do the evaluation.

Also consider to break down evaluation into two steps:

• Step 1: Just have the name of application object evaluated
• Step 2: evaluate its content

Step 1 is needed very fast, to display the new application objects in the TreeView. Step 2 is only needed when the user clicks on one of the application objects.