Enhancing the drawing of highlighted messages

Implementation of the following feature request:
https://groups.google.com/forum/?fromgroups=#!category-topic/textual-support-group/feature-requests/U0j8pTu0OiA

Highlighted number of messages will be drawn in the channel/query badge
right before the total number of available messages The highlighted number
of messages will be painted with a green color as part of an overall oval
shaped badge.