The title is pretty self explanatory, but I should probably explain.
The current layout is functional, but takes a significant amount of time to get configured to a specific screen size or resolution. Allowing the user to start with a grid size of their choosing will allow them to verify the correct size before they begin their layout. Once they have found the correct size, the user could then drag and drop their available tiles onto the grid.
This would eliminate all of the back and forth necessary to do a new panel layout, as well as the need for blank tiles to be added.
Customer support service by UserEcho