CJA: add description field to guided analysis

[#1]

Description

The guided analysis feature in Workspace allows users to share configured items with others. While the creator can use a descriptive name to help others understand what the guided analysis may be about, there is not an option to add a description that provides more information about what the guided analysis is about. The screenshot below shows what the tooltip currently looks like:

Why is this feature important to you

The point of guided analysis is to allow users to include pre-configured analysis into their Workspace projects. As more of these are created and shared, it will be increasingly important for people to know which one to use. Currently, there is no way to convey what a guided analysis should be used for or what the settings of the guided analysis are.

How would you like the feature to work

Allow a description field in the guided analysis configurator. This would be similar to descriptions in the filter and calculated metric builder, as well as for components in the data view builder. Once saved, the description would appear in the tooltip.

Current Behaviour

There is no description field available in guided analysis.