Two bugfixes for Pie charts
- faces/pie: Properly limit compact chart height to face height
Otherwise we overflow out of the face bounds.
- faces/pie: Allow center text to overlap the chart at small sizes
We now constrain the text so it never goes outside the central pie area, but for small sizes this would cause things to wrap too early for people's tastes. This change allows the text to overflow onto the pie chart while still being constrained to the total applet size. This reduces the cases where things wrap until we really don't have any other option short of just completely hiding the text.