Closes #222 Autoplay the next related video

[k----n]

Motivation and Context

This pull request fixes the bug where it would autoplay whatever was in the search box, but might lead to search results in PR #258 . It uses code from PR #231 and #258.

Types of changes

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Fixes PR #258 bug that autoplays the next query in the search box.
Instead, the next song that is related plays instead.

Final checklist:

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• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING guidelines.
• All tests passed.

[k----n]

Although I do not agree with some of the design decisions, I will refactor the code when working on #229 .