Datagrids had some off-by-0.5px issues that created tiny gaps to the

right of datagrid headers and bodies, leaving a little visual noise on

high-DPI displays. We had attempted to work around this in the past, but

it relied on older behavior in jQuery that rounded pixels, which wasn't

safe and regressed when we upgraded jQuery a while back. We now round

this ourselves, ensuring we're using a suitable size.
We also had a much larger gap on the right-hand side of the header when

the body had a scrollbar visible. This was caused by us fetching the

width of the datagrid body using height() instead of outerHeight(),

which meant the scrollbar wasn't being factored in.
Those calculations also fell apart on datagrids without column

customization. We were always updating the second-to-last column to take

the extra width intended for the scrollbar, assuming that that column

was the last data column and that the last actual column was the Edit

Columns icon. We now check whether the datagrid offers column

customization, adjusting the index of the last data column accordingly.

Tested on datagrids with and without scrollbars, and datagrids with

and without column customization.