1. use form checkboxes for the 'file wanted' toggle
2. remove unused file_wanted_buttons.png
3. narrow the priority buttons a little
4. narrow the priority buttons' gradient range by about 2/3 so that the colors don't look harsh when there is row after row of priority buttons
1. sync the toolbar buttons' appearance to match the footer & inspector buttons' new look from r13016
2. make the buttons a little easier to tap as per ticket #3862
3. try new toolbar icons from the 'wireframe mono icons' (CC attribution/noncommerical 3.0) by gentleface.com, found at iconfinder.com.