[Acceptance Testing] Ever-changing colors for tags and group labels

[Choony93]

Noticed the color of your tags and group labels will always change whenever the user restart the program. As a user, it would be easier to remember and identify certain tags and groups based on colors. However this cannot be done if the colors are ever-changing.

Consider checking out the code reuse offer here on how to easily generate persisting colors based on string hashcode.