I would like to create a table similar to a Windows Explorer list view where the grid takes up 100% of the page width, and the last column is just a filler column taking up the remaining width to fill up 100% of the page.
Do you have a sample CSS or script to create this grid?
Such mode can be enabled by js command, while defining column widths you can use
grid.setInitWidths("100,150,100,");
The as width means that column will be created as filler, it will take all available space and automatically adjust on window resize.