bug 1038167 - Remove 80x80, 256x256. Add 84x84. Update System to correct icons. r=timdream
Merge pull request #21931 from nullaus/bug1038167

bug 1038167 - Remove 80x80, 256x256. Add 84x84. Update System to correct...
* actually add 84x84 icons.
Merge pull request #21932 from nullaus/bug1038167

bug 1038167 - Add 84x84 icons.
Bug 1022506 - Search results app uses a white icon, rather than a dedicated nicer looking app icon
Merge pull request #21906 from gasolin/issue-1022506

Bug 1022506 - Search results app uses a white icon, rather than a dedica..., r=kgrandon