Change the old Tracker navigation bitmap buttons to HVIF icons
completed by: waddlesplash
mentors: Kacper Kasper, Adrien Destugues - PulkoMandy, Gerasim Troeglazov
Tracker is Haiku's main user interface and file browser/manager.
Tracker has a navigation bar with next/previous/parent buttons to navigate the filesystem (this is optional and not enabled by default). These buttons are currently drawn as bitmaps, with two unwanted consequences:
* They look ugly and use an old icon style
* They are not scalable
Modify Tracker code to use vector icons instead. You can use the arrow icons from zuMi's BToolbar set (http://zumi.xoom.it/myhaiku/btoolbar/index.html). Vector icons are decoded using the BIconUtils class in Haiku to convert them into a BBitmap.