- added LineChart of Metric to MetricDetail with Block options of ShowChart, ChartStyle, SlidingDateRange, and CombineChartSeries which defaults to showing the chart for all dates without combining values.
- fixed up FlotChart to only show when Visible=True
- change the text "combined" to "Total"
- added an order by metricvaluedatetime to MetricValuesController.GetByMetricId just to be on the safe side (flot should be doing the ordering even if that wasn't done)