Fix: The cell width and height were rounded to int in the table
constructor. The imprecison of rounding would accumulate when stacking
cells in a row or columns leading to gaps at the bottom and right hand
edge of tables.
The rounding has now been removed and left to the cell constructor.
Cells are derived from the Rectangle class, which does the rounding
itself. This eliminates the issue with accumulated gaps in the tables.
5dc13e7137