If we execute it from VimStateMachine directly, then mode change listeners are not notified

It is global in Vim

This bug was caused by two reasons:
1. KeyHandler state is not longer per-editor and we can't reset it on editor creation
2. We do not need to do such things on editor creation. What actually matters is focusing the editor

Mode is global now

…l in Fleet

Why is the old interface bad?
- it is not obvious. You cannot create a new panel or check if it is already created. Only "getOrCreate" it
- output panel is bound to editor while in Vim it is global
- we have the `isActive` field and the `clear()` method at the same time, because interface implies that you store the same instance of the panel and reactivate it for each output and I don't like it. We also can forget to call `clear()` after reusing panel
- we cannot "build" output before showing to make the panel more efficient. With multiple carets we can only cal `output(oldText + newText)` for each caret, and it is bad. (imagine we have global command with a lot of matches and for each time we will need to call the `output(oldText + newText)`)
- the `output()` method shows panel, activates it and updates it
- there are more things that I do not like, but the points above should be already enough

…tation

It's an oneliner that we can live without