This is done instead of deleting the results to reduce vertical jumping on updates.

Previous tests look for stale results to be detached, now they are hidden to prevent layout jumps

Prevents missed changes during debounce timeout

The only ones that remain are those that require a rendering change. All of those the were included to trigger a recalculation should be covered by an update th mathcellchanged

Removing `$cells = $cells` entirely failed since DOM updates for parsing errors were no longer being applied.

…tion

Creates a larger target for focusing using a mouse or touch input

Should improve startup time and reduce memory usage at startup

For tall cells, it is sometimes hidden after clicking the delete button

This preserves the browser's using of Control+Minus to zoom out

Parse and store statement at time of edit instead of at time of assembling statements for solver.

Also, fix crash when last table row is selected and earlier row is deleted. Test added for this case as well.

Or if parameter or unit rows are changed

Previously, they were reparse on any sheet change

Since table parsing is skipped if there is a syntax error anywhere in the table, even an edit on an inactive row can impact table parsing

Especially important for sheet loading since this function will get called for every math field in a table but the result will always be the same