Make sure to switch back to code when adding new sprites

[paulkaplan]

Resolves

What Github issue does this resolve (please include link)?

• Resolves Add a sprite should default to Code tab (as in 2.0) #3440
• Fixes Uploading a sprite without any sounds while the sound tab is visible crashes sound editor #2858

Proposed Changes

Describe what this Pull Request does

Make the sprite library, surprise sprite and file upload sprite switch to code tab once the sprite is added. Adds an integration test to make sure it does that. Also check that the "paint a sprite" switches to the costume tab

Reason for Changes

Explain why these changes should be made

Test Coverage

Please show how you have added tests to cover your changes

Browser Coverage

Check the OS/browser combinations tested (At least 2)

Mac

• Chrome
• Firefox
• Safari

Windows

• Chrome
• Firefox
• Edge

Chromebook

• Chrome

iPad

• Safari

Android Tablet

• Chrome

[rschamp]

Thanks for the integration test!

[paulkaplan]

@kchadha I added switching to the code tab on restore because it seems correct and it also fixes #2858

[thisandagain]

Thanks @paulkaplan.

/cc @ntlrsk @kosiecki