PERF: Check for modal visibility in a more efficient way
This code runs on every keyup event in the application, so it needs to be efficient. Previously we were iterating over the whole document using the JQuery :visible selector. Per the JQuery docs at https://api.jquery.com/visible-selector/
Using this selector heavily can have performance implications, as it may force the browser to re-render the page before it can determine visibility. Tracking the visibility of elements via other methods, using a class for example, can provide better performance.
We already had a
hidden class on the modal element which we can check, so we can check that instead.
GitHub sha: 76d5e54a