Add support for not showing stages and allow user entry of build count

[michaeljones32]

This PR adds support for:

• Showing overall build status rather than all stages. This means users can have more compact dashboards if builds have many stages in a pipeline.
• Freeform input for the build count. I have preliminarily set a maximum of 50 as otherwise it will probably get overcrowded.
• Scrolling within the widget. This is useful when the build count is high and overflows the size of the widget.
• 1x2 Size for the widget. This allows for compact dashboards when not showing stage information.

Hopefully this is acceptable, but please let me know if there is anything you need to get this merged. Thanks!