Plasma-dialer does not manage sleep inhibition when call is active
After sleep timeout, device falls asleep even if an active call is present. Looks like this feature was introduced in !31 (merged) and later someway removed in !71 (merged) .
I will try to fix this by myself by importing lines from !31 (merged), it could take a few days/weeks... if anybody more skilled feels like solving this faster, feel free to go on!