Related to this, but I didn't want to start another thread about it, is that there's a bit too much white-space IMO in the UI, particularly in pages like the Manage -> Spool page. The trend towards white-space has always been a bit of a waste of screen space, but in a data-intensive web application all this white-space just makes it harder to see the data.
So my simple suggestion is the following style rule:
.st-table .table>tbody>tr>td, .st-table .table>tbody>tr>th, .st-table .table>tfoot>tr>td, .st-table .table>tfoot>tr>th, .st-table .table>thead>tr>td, .st-table .table>thead>tr>th
Change the padding: 10px to something a little more moderate, like padding: 5px. I tested that using Chrome's dev tools on the spool management page and it made quite a bit of difference in both how well the columns fit on the page as well as how many rows show on the screen before scrolling.