Standardizing spinner placement and adding missing spinners, Fixes #689

[alexcottner]

Goal of this PR is to add missing spinners and standardize spinner placement.

• Fixes #689 by showing a spinner while groups are loading
• If a spinner exists on a component using a tab control (ex: BucketTabs), spinner should exist inside of the tab control if we have enough context
• If a spinner exists on a component that renders a table (ex: CollectionDataList), spinner should exist inside the table if we have enough context
• Updated unit tests where adding or moving the spinner required a test update