Static analyzer result pages filter checkboxes are slow

E.g., for WebKit clicking "All Bugs" checkbox on https://build.webkit.org/results/Apple-Sequoia-Safer-CPP-Checks/302370%40main%20%285930%29/scan-build-output/StaticAnalyzer/WebCore/index.html can take quite a bit of time.

This is because the script goes row-by-row and changes the `display` property value of each row independently.* It would be much quicker if it used CSS better. For instance, the script could toggle enable/disable classes on the `table` element and CSS could use that in combination with the row classes to hide the relevant rows.

---

*I based this on this code which is not good for rendering performance:
```
function SetDisplay(RowClass, DisplayVal)
{
var Rows = document.getElementsByTagName("tr");
for ( var i = 0 ; i < Rows.length; ++i ) {
if (Rows[i].className == RowClass) {
Rows[i].style.display = DisplayVal;
}
}
}
```

Load the linked static analyzer result page and trace the SetDisplay function in the result-page assets. Compare the current row-by-row filtering with table-level classes and row CSS, then verify that the checkboxes still show the correct rows and respond faster.

Written by the indexing model from the issue text.