I was doing nasty things with a for loop - we've replaced it with a
map statement, which achieves the same thing but works better with
Vue.js reactivity.
Each ImJoy window now gets its own top-level tab.
This involved some fairly significant refactoring of the ImJoy
component, but I think it's cleaner now.
I've moved imjoy-related stuff into a store "module" to keep it clean.
