Add missed timer initialization in aedevmode_emitter:init

[ThomasArts]

replaces PR #4303 to get permission to run CI

[uwiger]

Is this necessarily what one wants, though?

My assumption has been that one would often want to manually start/stop block production.
Perhaps an option to control auto-start?

[ThomasArts]

Is this necessarily what one wants, though?

My assumption has been that one would often want to manually start/stop block production. Perhaps an option to control auto-start?

Indeed. I have questions here:

1. to @uwiger where is the specification on how this should work? If you have auto-emit true and a microblock interval set, how then do you guarantee that you keep that interval?
2. If you use auto-emit false then @davidyuk why do you expect micro blocks to be produced at all unless you call mine_until_txs_on_chain?

[ThomasArts]

This is not the right solution to the problem, we need to revisit the emitter to support additional use cases and document better what it does today.