mx-table: Clean up
mx-table: Clean up

Be more consistent with the coding style internally, make the typical
cols/rows, width/height funcs more symmetrical

pwithnall/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx,pwithnall/mx