Add visual progress indicators on server-bound iteractions

## Setting a document as public or private

Currently, the user sees no visual indication of what is happening when they click a document's _Publish / Public_ toggle button. This is fine when the chain of effects takes place very quickly (such as on local development boxes), but not in real-world usage. The button's state should reflect the fact that an operation is in progress.

## Audit: find other applicable interactions

There may be other places where we also need this enhancement. Audit.

No file or test is named. Begin by locating the document Publish / Public toggle and tracing its server-bound action, then audit the other interactions that use similar server requests. Done means the toggle visibly reflects an operation in progress and applicable interactions identified by the audit have equivalent indicators.

Written by the indexing model from the issue text.