Use higher dpi image for about dialog. Fix #833
Use higher dpi image for about dialog. Fix #833

As discussed this will later go into an about: page.  Using the higher
dpi image always is fine for now because it gets resized anyway.  It is
still a little squashed but temporary and it's as it was.  I think the
icon was replaced at some point with 3 dpi variations and the old filename used to have the high dpi icon inside of it.

Auditors: da39a3ee5e6b4b0d3255bfef95601890afd80709@aekeus

timborden/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop,manninglucas/browser-laptop,MKuenzi/browser-laptop,willy-b/browser-laptop,MKuenzi/browser-laptop,willy-b/browser-laptop,dcposch/browser-laptop,jonathansampson/browser-laptop,timborden/browser-laptop,darkdh/browser-laptop,diasdavid/browser-laptop,Sh1d0w/browser-laptop,luixxiul/browser-laptop,Sh1d0w/browser-laptop,pmkary/braver,timborden/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,dcposch/browser-laptop,diasdavid/browser-laptop,Sh1d0w/browser-laptop,dcposch/browser-laptop,manninglucas/browser-laptop,luixxiul/browser-laptop,darkdh/browser-laptop,pmkary/braver,MKuenzi/browser-laptop,willy-b/browser-laptop,darkdh/browser-laptop,MKuenzi/browser-laptop,jonathansampson/browser-laptop,dcposch/browser-laptop,manninglucas/browser-laptop,darkdh/browser-laptop,Sh1d0w/browser-laptop,jonathansampson/browser-laptop,manninglucas/browser-laptop,willy-b/browser-laptop,pmkary/braver,pmkary/braver,jonathansampson/browser-laptop