GitLab

- Rename references

- Do not reverse the array of colors

Replace if/else block with ternary operator

- Rename function since it supports both line and column charts

- Add logic for comparing the lengths of the timestamps and aggregated
values arrays

- Update the function documentation

- Move the function to a different module file

Function provides a 'hack' that ensures that the correct phenomenon
symbols are displayed by a scatter plot's tooltip

... for use in the y-axis text of charts

Move creation of the combined names + symbols array to the if/else
block

We were using the original VL observations array in the 'map' array
method. Updated to use the final version of VL observations array

Confirm that the selected drop-dowwn options are valid before fetching
the observations

It is assumed that this chart type will be used for visualizing
aggregated results