Conway's game of life: Animation does not consider the bounds of the field

## Conway's game of life: Animation does not consider the bounds of the field

Clicking the "Go" button after an animation has already ended will calculate the animation based on the current state of the field, but will start with the bounds originally put for the shape.

After the bounds have been extended to the whole field, clicking the "Go" button again should continue animating the whole field. The calculation bounds should not be reset to the size of the initial shape. The bounds should only be reset when a shape is selected from the combobox.

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#### Issue metadata

* Issue type: sample-update