LogBrowser: canned sensor reports not using Instance fields

The LogBrowser has many convenient canned reports but sadly they don't seem to work since the introduction of the instance fields. For example, below is the Compass mavgraphs and we see the values from all 3 compasses are being used instead of just the first one.


Start by locating the LogBrowser canned report definitions and the Compass mavgraphs report mentioned in the issue. Trace how those reports select sensor values and verify that the first instance is used rather than values from all three compasses; done means the canned reports correctly honor Instance fields.

Written by the indexing model from the issue text.