Revisit state transition to improve usability

[ddelpiano]

• everything required should have a little red-asterisk or a tooltip to say why we cannot move forward.
• also, if the state transition button is disabled, when hovering this show the tooltip to explain why.
• also, the double click for the state transition to first open the dropdown and then the button it’s annoying

[stappan]

Instead of a dropdown, can we display each state horizontally across the UI so that we can see what state we are in and know what is possible to move to? Moving from sentences to statements is difficult; and it's difficult to know what is preventing the transition to Compose Now in the sentence window. @ddelpiano