* Fix how the annotation layer interpretes the timestamp string without timezone info; use it as UTC
* [Bug fix] Fixed/Refactored annotation layer code so that non-timeseries annotations are applied based on the updated chart object after adding all data
* [Bug fix] Fixed/Refactored annotation layer code so that non-timeseries annotations are applied based on the updated chart object after adding all data
* Fixed indentation
* Fix the key string value in case series.key is a string
* Fix the key string value in case series.key is a string