Show Number of Transactions before Install

[orishim]

Requested by Ezra here.

User Flow

Current

U.I. makes it looks like there will be 2 transactions (even though there could be between 2-8)

New

U.I. calculates and displays how many transactions are expected ahead of time (based on how many schemes turned on, which have custom voting params, etc.)

[dOrgJelli]

I suggest we wait until we update the DAOcreator to the new migration script that uses the arc-hives (DAOfactory + SchemeFactory).

Currently, given N custom voting machine configs that aren't already stored on-chain, there are N * 2 transactions required. If we use the arc-hives, the total number of additional transactions goes to simply N. This will be very easy to detect in the DAOcreator UI and tell the user ahead of time what to expect.