Allow credit card users to add funds at deploy time

[anilmurty]

Problem Statement

Deployments created by credit card users default to $5 in the escrow, which (depending on resources leased) can sometimes allow the deployment to run for only a few minutes. Users have the option to "Add Funds" but sometimes forget to do so and have their lease closed.

Proposed Solution

Allow credit card users to optionally add/ increase the funds that go into escrow at deploy time.

The changes would be

1. Show a text box (similar to the one we show for wallet users) where a default value of $5 is populated and the user has the option of increasing it. This would be added under the resources box shown below
   

2. Check credit balance to ensure there are funds to fund the escrow account.

3. Give user the option to purchase more funds

One thing I realized @aktdenis @baktun14 @ygrishajev is that we call both "Adding funds to the account" and "adding funds to the deployment" as "Add Funds" - we may need some distinction between the two

[aktdenis]

@anilmurty
how about "Top Up Deployment"?... or the other way around and say "Top Up Account"?