Keep editMode boolean in stripes-core local resource
Keep editMode boolean in stripes-core local resource

Instead of a piece of React component state. This makes edit-mode
persistent because it's in the Redux store -- so navigating away from
an edit-user page to another app, then returning to the Users app,
will remain in edit mode.

Fixes the ui-users half of scenario 3 of STRIPES-362.

folio-org/ui-users,folio-org/ui-users