AJAX search on Plugins screen should remove highlighting from status filters

[johnbillion]

Steps to reproduce:

1. Visit the Plugins screen and click one of the status filters, such as Active.
2. Enter some text in the Search installed plugins... box, but don't hit enter.
3. Note that the AJAX search results include plugins of any status, yet the Active filter link is still highlighted.
4. Bonus: Clear the search box, and the screen will display all plugins, not just the active plugins.

[swissspidy]

We should fix this in 4.6.1.

37657.diff​ is a proof-of-concept patch that addresses these issues.

• Display the filtered list of plugins again when clearing the search box
• Removes the current class from the filter navigation when doing a search to match behaviour when you reload the page

I'm not sure the search should be limited to the filter currently being set, e.g. only search inside active plugins. That's not the case for the "Add Plugins" screen either. There, it's more clear because of the added "Search Results" tab.

[swissspidy]

In 39099:

Plugins: Improve Ajax search of installed plugins.

Removes the highlight from the current filter when performing an Ajax search and adds it back when clearing the search input.

Fixes #37657.