Fix: front end bugs

[Formasitchijoh]

What this PR does

This PR fixes several failing feature tests that were raising ElementNotFound errors. The failures primarily occurred in React-Select components that rely on API requests to fetch and render data. Due to Capybara's short default wait time, tests failed before the data was displayed. This issue was most notable in category_scope_spec.rb but also impacted other minor failures in frontend code, such as scoping_methods_course_creation_spec.rb.

Key Changes Made

• Increased Capybara's default wait time: To handle delays caused by slow API requests and ensure data is rendered before the test proceeds.
• Ensured unique keys for course campaigns: Used the CampaignList index to generate unique keys for course campaigns.
• Handled undefined valid and search values: Addressed these issues in the CourseCreator page to prevent errors.

Files Changed

• rails_helper.rb
• campaign_scope_spec.rb
• course_creator.jsx

Screenshots

Before:

After:

[ragesoss]

Ooh, this looks like a great set of fixes!