Use black text on pie & row charts
Fix typo (missing . in class name)
Allow the margins to be passed into getDimensions
Size charts according to containers & refactoring

- charts take their sizes from parent containers. Complicated by
fact that the tab is initially not visible and dc is not smart
enough to do it itself
- add a top problems row chart
- add a datacount widget
- fix databindings of select elements in the national form