Rename props for overlay mode

[jsuarezgonz]

We should unify the name of the prop to determine when a component is in overlay mode for the dialog, progress bar, alert, and spinner. Actually we have a prop called 'mode' for alert and spinner and one prop called 'overlay' for the progress bar

[github-actions]

This issue is stale because it has been open for 15 days with no activity. If there are no further updates or modifications within the next 15 days, it will be automatically closed.