Universal Dividend periods should be handled in time directly (not number of blocks)

We shoud:

• impl trait OnTimestampSet to pallet universal dividend
• change Handler OnTimestampSet in pallet_config, to something like: type OnTimestampSet = (Babe, UniversalDividend);

The hard part is that this require a migration to handle the "conversion" from old behavior.

changed milestone to %runtime-200

added C-runtime D-hard P5-sometimesoon S-ToDo labels

PoC in branch ud-time-64

changed milestone to %runtime-400

changed the description

changed milestone to %runtime-500

added ET-days Maybe-Mandatory-Prod labels

removed ET-days label

added ET-weeks label

changed milestone to %runtime-600

assigned to @tuxmain

removed S-ToDo label

added S-doing label

Could we close since 0728b9df is merged?

closed