Harden Page List Feature Spec

[mamhoff]

We do a lot of page interaction in this spec, and sometimes there's a race condition: We specify that we want to find stuff within "table.list", and Capybara remembers those elements before the page gets actually reloaded, leading to spec failures like this one:

https://github.com/AlchemyCMS/alchemy_cms/actions/runs/8637028349/job/23678297291?pr=2831

Here, the error message was:

1) Admin page list as author can filter table of pages by status
     Failure/Error: expect(page.find("tr:nth-child(1) td.name", text: "Intro")).to be

     Capybara::ElementNotFound:
       Unable to find css "tr:nth-child(1) td.name" with text "Intro" within Obsolete #<Capybara::Node::Element>

The hint here was "Obsolete".

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.84%. Comparing base (4df4762) to head (9fcacec).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2832 +/- ## ======================================= Coverage 95.84% 95.84% ======================================= Files 227 227 Lines 6186 6186 ======================================= Hits 5929 5929 Misses 257 257 ```

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