fix: Alllow excluding pages from smart scoping

[SuaYoo]

Resolves #3516

Changes

• Always shows exclusion table if smart scoping is enabled.
• Removes exclusions from "Page" scope workflows if additional scope is not enabled.

Manual testing

1. Log in as crawler
2. Go to new workflow
3. Change scope type to "Page List". Verify exclusion table is shown
4. Change scope type to "Page". Verify exclusion table is shown
5. Uncheck "Use smart scoping rules". Verify exclusion table is hidden
6. Go Settings > Crawling Defaults
7. Add default exclusion and save
8. Go back to new workflow
9. Uncheck "Use smart scoping rules". Verify exclusion table is still visible
10. Repeat 3-5 for editing existing workflow

[SuaYoo]

@emma-sg @ikreymer The first commit in this PR is a formatting change; the main changes can be viewed here https://github.com/webrecorder/browsertrix/pull/3518/changes/8ae965ad5a0840c20a5fc0ac7ae78889bae4f83f..235b1943896f02c8fe9b0adb52abdff16c6039b4

[ikreymer]

Looks good, tested on dev