Miscellaneous fixes for various automation UI failures.

a) Base UI: Add optimum delay for `wait_until_element` function
b) login UI: I think earlier we had no `Default location`, but now since Beta we do have, hence removed location creation and added location selection similar to Orgs.
c) navigation UI: Many failures due to the use of `find_element`, looks to be just timing issues.
d) Fix tests UI: puppet-environment accepts only alphanumeric values, which is stated explicitly by the UI.
e) Raised the genuine bugs and added them to be skipped for testcases.
Why this class should inherit from `UINoSuchElementError`?