Improve reliability of feature specs

[CloCkWeRX]

A number of common features just fail:

  2) Leads 
  In order to increase sales
  As a user
  I want to manage leads
 should create a new lead
     Failure/Error: expect(leads_element).to have_content('Mr Lead')
       expected to find text "Mr Lead" in ""
     # ./spec/features/leads_spec.rb:47:in `block (3 levels) in <main>'
     # ./spec/features/leads_spec.rb:30:in `block (2 levels) in <main>'0m

50% of the time.

We should:

• Look at timing issues
• Look at other ways to make these more reliable. Perhaps counting the number of active ajax requests and waiting until it drops to 0 on key tests?
• Or remove them, if we are going to ignore failures.