Usage of `implicitly_wait` in selenium tests can slow down tests quite a bit.

[Simon Charette]

While reviewing #26575 I noticed that some find_elements_by_css_selector were taking forever to execute (10 seconds) and I realized it was related to #26048.

One example is when AdminSeleniumTestCase.assertSelectOptions is used to assert that no options are present (assertSelectOptions('#select', []). In this case the find_elements_by_css_selector('#select > option') call blocks for 10 seconds as no options are present in the select.

Since there's no way to specify an explicit timeout argument to the find_elements methods I think we'll have to issue an implicitly_wait(0) before calling them. Ideally we would use an explicit wait with an appropriate condition if values == [] but I can't find how to bypass the implicit wait when calling find_elements methods.

[Simon Charette]

​PR

[Simon Charette <charettes@…>]

In ad0f536e:

Fixed #26577 -- Disabled implicit wait of Selenium tests where appropriate.