There is a file called ListViewWidget.scss, but Guidewire in Guidewire Studio has it in a folder that they reserve as non-editable. If you do edit the file, you can adjust the css for the ListViewWidget.

Eg. something like this

results in the paging controls being shifted to the left and no longer right-justified

This could be something you could play with, but I dont think it would be Guidewire approved.