Improve the flow to start auctions (with drip and poke)

[LukSteib]

Goal

Extend the flow to start collateral auctions with possibility to call drip and poke via the UI.

Context

During our investigation of the functionality to start auctions (see: #363) we figured that drip and poke are two un-protected functions that both directly impact the state of a vault.
In the future we want to offer users the possibility to call these two functions via our UI. This will improve the overall UX to liquidate a given vault.

The related issue for the first iteration of the mock can be found here: #419

Tasks

• Reference the functionality of drip and poke in the issue
• Extend the mock accordingly
• Outline implementation approach to add desired functionality