Enhance UI Feedback during API calls

[jbouder]

Reference Issues or PRs

#51 (in reference to 404 errors)

What does this implement/fix?

Put a x in the boxes that apply

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features not to work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

• Did you test the pull request locally?
• Did you add new tests?

Documentation

N/A

Any other comments?

• Added Loading indicator to home page Apps and Services grids
• Updated Create App form to disable Submit until all API dependent fields have loaded
• Updated to redirect to spawn pending page upon app creation

[aktech]

Looks great!