Improve workroom creation UI flow #116

Problems:

• During setup, no workroom tab is shown for the new workroom
• Slight delay from create to display of new workroom or running of setup script, where nothing seems to happen. We see a loading animation in project sidebar, but no where else.

Actions

• Remove the Alien Mother BG completely.
• Create a workroom tab as soon as creation begins.
• Show the setup dialog immediately, even if there is no setup script.
• If there is no setup script, the setup dialog should have no dismiss button, and the dialog should dissapear automatically.