Graphic bug surrounding the tissue heatmap

[Dirk Hohndel]

> On Jan 14, 2017, at 12:28 PM, Anton Lundin <glance at acc.umu.se> wrote:
> 
> I zoomed into the tissue heatmap, and noted that it doesn't align with
> the partial pressure graphs and the tank bar in X-axis, and it looks
> like the tank bar paints on top of the tissue heatmap.
> 
> See the two attached screen-grabs for details.

Yep - looks like the heat map is slightly too big in all directions.
I haven't had a chance to look at the code - and frankly, with 4.6
almost ready to go I won't lose sleep over it, but if someone
finds out why this is the case, that would be neat.

/D