A user configurable chart for showing ride metrics and
other calculated values over time.
* Uses SQLITE database to store metrics
* Supports any metric available from the metric factory
* Adds new MaxHr, VI, Peak Power and Time In Zone metric
* Also includes LTS/STS/SB for PM charting
* Aggregates in days, weeks, months or years
* Reads and Updates seasons.xml
* Adds cycles and adhoc date ranges in seasons.xml
* Date ranges can be selected on the plot with shift-left click
* Allows users to customise preferences for color, symbols et al
* Allows user to customise metric names and unit names
* Supports smooth curves and topN highlighting
* Has a linear regress trend line function
* Allows users to save charts to charts.xml
* A default charts.xml is built-in
* A chart manager to import/export/rename/delete charts etc
* Provides a tooltip to provide basic datapoint information
* Performance Manager adjusted to use the MetricDB
* User configurable setting for SB calculation (today/tomorrow)
The symbol of a ride metric is the string by which we refer to it in the
code, configuration files, and caches (like stress.cache). It should not
be translated, and it should never be shown to the user.
