Updated UI for first time wallet creation

[srirambv]

Test plan

• Clear profile and create a new one
• Enable payments in the new profile
• Make sure add funds button is already there

Original issue description

• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  First time wallet creation causes some of the UI elements to be not shown until the wallet is created. This looks very unpolished(see screenshot)

• Platform (Win7, 8, 10? macOS? Linux distro?):
  All

• Brave Version (revision SHA):
  Brave 0.14.0
  rev ffa6f8f

• Steps to reproduce:

  1. Clear profile and create a new one
  2. Enable payments in the new profile
  3. UI looks bad

• Actual result:
  First time wallet creation UI looks bad

• Expected result:
  Should be more polished

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  No since UI is different form 0.13.5

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:
  

• Any related issues:
  cc: @mrose17 @bradleyrichter @NejcZdovc

[bradleyrichter]

ok, the desired fix here is to show all elements when the screen redraws, but any elements that are not clickable should be disabled. (instead of hidden)