TLN Make `Search options` string translatable in `SearchBox.js`

[pschiffe]

Description

Manual testing steps

Issues

• 1689

Pull request checklist

• [x] The target branch is correct
  • See picking the right version
• [x] All commits are relevant to the purpose of the PR (e.g. no debug statements, unrelated refactoring, or arbitrary linting)
  • Small amounts of additional linting are usually okay, but if it makes it hard to concentrate on the relevant changes, ask for the unrelated changes to be reverted, and submitted as a separate PR.
• [x] The commit messages follow our commit message guidelines
• [x] The PR follows our contribution guidelines
• [x] Code changes follow our coding conventions
• [x] This change is covered with tests (or tests aren't necessary for this change)
• [x] Any relevant User Help/Developer documentation is updated; for impactful changes, information is added to the changelog for the intended release
• [x] CI is green

[pschiffe]

This change will automatically get to the 2.1 branch, right?

[GuySartorelli]

This change will automatically get to the 2.1 branch, right? Yes, if this PR is merged in, the change will also be merged up to 1, 2.1, and 2.

[pschiffe]

Please also add this to the client/lang/src/en.json file, so that it can be added to the list in transifex.

Done, thanks.

[GuySartorelli]

Oh yeah - changes to javascript require building the distribution files, which is why the JS CI build is failing. Can you please give that a go? Instructions are at https://docs.silverstripe.org/en/contributing/build_tooling/ - if you get stuck I'm happy to help.