Don't hardcode number of rows

So far we only allowed for 4 row layouts, allow for up to 5. This allows us to e.g. add a thai layout.

The result isn't ideal yet as one 5 row layout increases the height for all layouts but it at least allows people to use it. The nicest way to fix this would be to adjust the margin based on the number of rows so we don't need to resize the widget.