[NT-565] Limit menu options when backing is on preauth state

[Scollaco]

📲 What

• Handles the case when the backing on the ManagePledgeViewController is on a .preauth state.
• The top right menu now can only show Contact creator.

🤔 Why

• Users shouldn't be allowed to manage pledge when the backing is on the .preauth state.
  JIRA ticket

🛠 How

• By changing the logic of the signal that determines which options should be available on the menu.

👀 See

.pledged state 🐛	.preauth state 🦋

✅ Acceptance criteria

The easiest way to test this is by using Charles and adding a breakpoint to edit the response from the /v1/projects/ endpoint. (On the Project Page).

• Back a project and go to the ManagePledgeViewController. The status label should say If the project reaches its funding goal, you will be charged on [date] and the top right menu should show all the options to edit pledge.
• Using Charles, change the backing.status value to preauth. The status label should say We're processing your pledge--pull to refresh and the top right menu should show only Contact creator.