change the button text when the state is toggled, and notify the user that the button text may change
changed the creation order of the contol UI elements to make the tab order a little more intuitive
make the progress bar more accessible to screen reader users
Merge branch 'a11y/button-text-toggle' into combined-changes
Merge branch 'a11y/control-order' into combined-changes
Merge branch 'a11y/progress-bar' into combined-changes