Fix : change state/action for keypad Develco/Frient

[Smanar]

Concern devices

• Develco Products A/S
• frient A/S

Add the support for "state/seconds_remaining"

Else the keypad can't work because of code

            ResourceItem *panel = r->item(RStatePanel);
            ResourceItem *secondsRemaining = r->item(RStateSecondsRemaining);

            if (!panel || !secondsRemaining) { continue; }

[Gw3n4]

I performed a clean installation of my setup today, and when I integrated the frient keypad, the panel & seconds remaining were not updated when arming/disarming the alarmsystem (it was on my previous installation though... weird).

I modified the kepzb-110_keypad.json file and created the state_seconds_remaining_item.json file according to this fix and it now works perfectly well.

[Smanar]

Yep, it will be in next deconz version.
I will try to set the status to "Gold" too if I don't forget.