Description of the Change

Fixes a number of miscellaneous issues in EP 5.0.0 testing:

• Reverts the sync icon to the one that spins correctly.
• Adds a target _blank to an ElasticPress.io link on install screen.
• Makes checkboxes look more obviously disabled on Features and Sync pages.
• Stops a JS error appearing when sync requests are intentionally aborted.
• Makes the Sync page a form, so pressing Enter on a control will start a sync and the browser will validate inputs.
• Prevents negative numbers when setting an object ID range on the Sync page.
• Limits the Sync History to 5 items at all times.
• Fixes a JavaScript error in development mode when a Feature displays multiple requirements status messages.

Changelog Entry

N/A

Credits

Props @JakePT @burhandodhy @MARQAS

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.