[CDF-396] - CCC - options to better control the size and spacing of cartesian discrete axes bands.
* New cartesian axis options BandSizeMin and BandSpacingMin.
* GridDockingPanel can now handle child size increase.
Merge pull request #136 from dcleao/CDF-396

[CDF-396] - CCC - options to better control the size and spacing of cartesian discrete axes bands.