Make splash screen more detailed

[joeyballentine]

We should do a few things:

• be more verbose about what is going on at the current moment
• be clear what's installing and what progress it's at
• have some sort of better error handling and what to do when something breaks at this step. "Reset all settings" might be a good option to have if an error occurs as well

[RunDevelopment]

Why not just get rid of the splash screen and do it all in the main window? We already have a loading animation there anyway.

[joeyballentine]

That's a good idea actually

[RunDevelopment]

The splash screen was removed in #2731.