tests: get E2E tests working using RUN_SELENIUM_LOCALLY option

[GraemeWatt]

The end-to-end tests currently fail when using ChromeDriver locally with the RUN_SELENIUM_LOCALLY = True option with error messages like:

FAILED tests/e2e/test_dashboard.py::test_dashboard[Chrome] - assert False
FAILED tests/e2e/test_general.py::test_tables[Chrome] - AssertionError: assert '' == 'Figure 8 panel (a)'
FAILED tests/e2e/test_records.py::test_record_update[Chrome] - selenium.common.exceptions.ElementClickInterceptedException: Message: eleme...
ERROR tests/e2e/test_general.py::test_tables[Chrome] - AssertionError: Errors in browser log:

It would be useful if ChromeDriver options could be set to allow these tests to pass.