feat(visualization-bar): add new components

[charlieTheBotDev]

Description

Adds:

• VisualizationBar
• ProgressBar (new class with feature flag)

Motivation and Context

The existing progress bar is very basic and the API doesn't allow for much flexibility. The current ProgressBar api makes more sense as a different component (VisualizationBar) with improved visuals (i.e. showing values on bars, labels under bars etc.)

A new ProgressBar that provides a specific API with 'done', 'in progress' and 'plan' numbers made more sense in this case.

How Has This Been Tested?

Added unit tests to under-the-hood StatusBar (used by both new components) and the new wrappers

Screenshots (if appropriate):

Checklist:

• I have added a tag to this pull request that indicates the impact of the change (patch, minor or major)
• My code follows the code style of this project.
• I have updated the documentation accordingly. (This includes updating the changelog).
• I have read the CONTRIBUTING document. (Last updated 16 Aug 2019)
• All my changes are covered by tests.
• This request is ready to review and merge

[coveralls]

Coverage increased (+0.3%) to 69.681% when pulling 079dc75 on NO-ISSUE_visualization-bar into 4b2b9fb on develop.