If variable value is set in the url, run cell queries immediately

since we can now set variables in the URL, we should be able to load cell queries as soon as we land on a dashboard assuming all the variables are set.

Right now, it looks like we still wait for all the variable values to load before.

Start by tracing the dashboard flow that reads variable values from the URL and the point where cell queries wait for variable loading to finish. Confirm the behavior with a dashboard whose variables are fully specified in the URL, then ensure cell queries run immediately on arrival without waiting for unrelated variable values.

Written by the indexing model from the issue text.