Fix for missing 'Disarm' button

[gwww]

Disarm button does not show when in arming and disarming state.

[homeassistant]

Hi @gwww,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[BioSehnsucht]

Relates to /issues/1415

[balloob]

Why would it need to show in disarming state ? It's already disarming so one cannot disarm again?

[BioSehnsucht]

What state should be used for entry timers running (alarm will go to triggered state if not disarmed before entry timer expires) ? It's armed and going to alarm (maybe), but the siren isn't sounding so yet setting STATE_ALARM_TRIGGERED doesn't seem right. Should it be STATE_ALARM_ARMING for exit timer and STATE_ALARM_PENDING for entry timer? If so, what's the intended use of STATE_ALARM_DISARMING ?

[gwww]

Further to @BioSehnsucht comment, some alarm panels use pending when arming/disarming. The panel that we are working on (ElkM1), we chose to use arming and disarming states when arming/disarming. That seems more appropriate.

[balloob]

Well, this is not the place for a discussion about the available states of alarm panels. That would be in the architecture repo.