Reducing the minimum dissolve delay to 3 months

[ysyms]

@dominicwilliams

Outline of proposal:

1. Reduce the dissolve delays of all neurons by 5/8th (to 62.5% of what they is today)
2. The age property of neurons would stay the same (age increases over time, benefiting voting power, and is set to zero whenever a neuron is placed into dissolve mode).
3. The minimum dissolve delay at which a neuron can gain maturity by voting, would be reduced to a round 3 months.
4. The overall notional voting reward distributed by the network, which is logically distributed by votes to determine how maturity increases, would be reduced, such that the rate at which a neuron’s maturity grows, given some amount of locked ICP, dissolve delay and age, would remain almost identical to that today.

Only execute step 3, ignore the rest？