[Toaster] Tasks table row style

[Ravi Chintakunta]

I pushed a couple of commits to ravi/all-tasks-feature branch:

- add custom tag "task_color" to return a style based on task execution status and outcome
- tasks table that uses the custom tag

The custom tag can be included in the table row <tr> to style the entire row. The row cells that have a hyperlink do not pick up the style. You have to also include the custom tag in the <a href> tags to modify the style. 

Please review and let me know what you think.

Thanks,
Ravi