[Confluence] add FF/RW speed indicator to video osd - fixes #14411

it's pretty annoying to have no indication of FF/RW speed when you are using the video osd.
fixes trac # 14411

![ffrw](https://f.cloud.github.com/assets/687265/1945670/ab7adba6-7fd4-11e3-9795-f3ce6e240033.jpg)