[Question] making preview mode remember if visibility mode should be restored or not

I really like the idea, what about keeping track of all commands status at Commands level?!? Like for example, on any runCommand(CMD_ID) we gonna store it inside Commands.active object (eg. active[CMD_ID] = 1) and clear on stopCommand. Then we'll need Commands.isActive(CMD_ID) method for the check and probably also Editor.isCommandActive(CMD_ID) (just as a proxy method). I'd like also to move the runCommand/stopCommand logic from Editor and put it inside new Commands.run/stop methods (just to make it a more organized). What do you think? Would you able to create such a PR? :)

@artf I can probably do it if I can ask some questions here along the way. I'm still getting used to Backbone. Where would you put that Commands object?

Could you elaborate more on this?

I'd like also to move the runCommand/stopCommand logic from Editor and put it inside new Commands.run/stop methods (just to make it a more organized).

For Commands I mean the Commands module

Could you elaborate more on this?

I'd like, for example, moving this Editor. runCommand logic inside the Commands module, so in the Editor we will get:

    runCommand(id, options = {}) {
      return em.get('Commands').run(id, options);
    },