Add automatic "Update Data" configuration option

Add the option to automatically update data that were previously published by a continuous view when data have changed since the last publish time. For example, a continuous view runs once every 24 hours to gather interpolated hourly data from devices. These devices typically report back every 24 hours, but sometimes there are connectivity issues that cause data to come in late. Currently the Integrator will publish the previous value for each hour until a current value comes in and will not go back to recalculate the interpolated values that were already published. There is a workaround to manually select the "Update Data" button on the Integrator UI, but with many views this can become impractical.