tests: Give even more dialogs more time to open in tests

[tvdeyen]

These dialog tests fail often. We should give them more time to open.

[MadelineCollier]

Pretty annoying we have to do this, just reinforces the reasoning behind getting the admin spec functional without JS like you have been pushing for.

[github-actions]

💔 Some backports could not be created

Status	Branch	Result
❌	v4.2	Backport failed because of merge conflicts You might need to backport the following PRs to v4.2: - Merge pull request #5596 from softr8/backend_order_email - Merge pull request #5999 from mamhoff/easier-user-class-handle - Merge pull request #5993 from tvdeyen/harden-admin-feature-specs - test: Do not wait 30 seconds for a test to fail - test: Wait for modal to open before testing its content - Merge pull request #5979 from mamhoff/fix-missing-translation-spec - Merge pull request #5956 from mamhoff/allow-passing-in-user-class - Merge pull request #5954 from SuperGoodSoft/fix/new-rubocop-rules
❌	v4.3	Backport failed because of merge conflicts You might need to backport the following PRs to v4.3: - tests: Give dialogs a little more time to open - test: Wait for modal to open before testing its content
✅	v4.4

Manual backport

To create the backport manually run:

backport --pr 6017

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details