Feature request: adding static data to plot

A plot displays vlues of the database extracted with a query.
The plot type is defined by visualisation type and customized by properties (ie MIN value).

Added feature:
A table of name - value pairs as a property in the customization.

Use case:
Adding horizontal lines in the plot indicating significant values, high / low level marks or alert levels.

Examples:

For a table of disk utilization:
Warning,80
Critical,90

For a rpm levels on a turbine:
Startup: 1000
Idle: 5000
Max Efficiency: 21000
Max RPM: 25000

No files, tests, or entry points are identified in the issue. Start by locating the plot customization implementation and determine how query data, visualization types, and properties are represented; done should include named value pairs that render horizontal reference lines such as warning and critical levels.

Written by the indexing model from the issue text.