added logging of time taken by capybara find() and has_selector?() calls

using Time.now in wait_until_*() methods, so now have accurate timing before deciding to fail a test due to not being able to locate an element (or wait for it to disappear / become not visible)

fixed lightbox visible/not_visible bug causing tests to fail
added logging of time taken by capybara find() and has_selector?() calls

using Time.now in wait_until_*() methods, so now have accurate timing before deciding to fail a test due to not being able to locate an element (or wait for it to disappear / become not visible)

fixed lightbox visible/not_visible bug causing tests to fail