Add a progress indicator

When the data or parameters are changed, we should show a progress indicator since actions can take large amounts of time. Ideally, this will show progress instead of just being a spinner, though that may require refactoring the model code to emit in-progress events to the view model.

added Usability statusSelected for Development labels

assigned to @dugganjw

added statusIn Progress label and removed statusSelected for Development label

created branch 19-add-a-progress-indicator to address this issue

mentioned in merge request !16 (merged)

mentioned in commit 7b0587ef

closed with merge request !16 (merged)

removed statusIn Progress label