closes #5069

* update cloudwatch.md

* update changelog

fix(dashboard timepicker): fixed issue with time picker and UTC when reading time from url, fixes #5078

feat(snapshots): performance improvements to deep clone, makes snapshot's a lot quicker for big dashboards with a lot of panels and data

(prometheus) fix metric find query

* (prometheus) pass dashboard time range to template query

* (prometheus) add passing time test of templating

* (cloudwatch) assume role support

* save godep

* (cloudwatch) add assumeRoleArn field

* (cloudwatch) set cred provider for sts

* (cloudwatch) fix test

Add dBm as an option in energy units

closes #4984