Past stakes shouldn't be printed as "Active" with nucypher stake list #1418
Description
E.g.:
======================================= Active Stakes =========================================
| ~ | Staker | Worker | # | Value | Duration | Enactment
| | ------ | ------ | - | -------- | ------------ | -----------------------------------------
| 0 | 0x240e | 0x5d26 | 0 | 15000 NU | 31 periods . | Sep 03 11:04:10 CEST - Oct 04 11:04:10 CEST
| 1 | 0x240e | 0x5d26 | 1 | 15000 NU | 360 periods | Oct 17 11:04:10 CEST - Oct 11 11:04:10 CEST
In this example, stake 0 already ended as for october 16th, but it's still printed as active.