[third_party] port latest changes from QtAwesome
fix a typo
Merge pull request #149 from Chilledheart/patch-1

fix a typo
Merge pull request #146 from Chilledheart/qtawesome_backport

[third_party] port latest changes from QtAwesome
Merge pull request #154 from haiwen/fix-hdpi

Fix icons probelm on HDPI displays
added @2x icons