Improved progress bars for issues and versions
This patch implements an improved and more versatile version of the bar graphs shown for version and issue progress.
Despite the existing solution it's less restricted to a specific purpose. It's not limited to two stacked bars only and every bar can have it's own tooltip.
The bars can be styled as stack or next to each other. Label and graph are wrapped in a div which one can give a separate class and styling.
The progress bars in this patch are animated and have a subtle highlighting effect when they are hovered. The coloring fits the default theme and provides more contrast to the background.
I'm looking forward for your feedback. :-)