cache busting for report loading, and remove cache consideration from uu.chart.loadcharts(), which should (and will) only be called at page load.
fix auto-crop bug that trimmed intermediate null values from data, causing shifting and indexing issues for data point display when auto-crop is enabled.  Now only right-hand-side is trimmed from domain
Fix hover/click indexing: inject null point placeholder during barRenderer draw, such that checkIntersection() can have correct indexing; likewise, checkIntersection is modified to continue to next indexx on encountering a null point.