Use paper-menu mixin for selected styles. Fixes Gh-279
Use paper-menu mixin for selected styles. Fixes Gh-279

SB-Technology-Holdings-International/Water,abdonrd/polymer-starter-kit,andrefuller/PolymerTrailerViewer,klarkc/polymer-loopback-starter-kit,felixzapata/polymer-starter-kit,SB-Technology-Holdings-International/WateringWebClient,StartPolymer/polymer-starter-kit-plus,Serious-Rage/poligomy,StartPolymer/polymer-starter-kit-plus,andrefuller/PolymerTrailerViewer,gick/mobile-polymer-starter-2,anthonybrown/polymer-starter-kit,RoyKoh/Project-3,abdonrd/polymer-starter-kit,stephenzsy/charon-frontend,plusCubed/pluscubed-site,SB-Technology-Holdings-International/Water,Sykkro/penny-web,Ex-ante-Labs/pivot-ahead,Ex-ante-Labs/pivot-ahead,klarkc/polymer-loopback-starter-kit,stefanoantonel/brainpower,trendystore/store,StartPolymer/polymer-starter-kit,andrefuller/PolymerTrailerViewer,Sykkro/penny-web,stefanoantonel/brainpower,markovuksanovic/polymer-starter-kit,RoyKoh/Project-3,gick/reveries-project,michaetto/f16,flaiker/polymer-starter-kit,lordoftheflies/mlm-portal,grebett/polymer-starter-kit,Sykkro/penny-web,stephenzsy/charon-frontend,stephenzsy/charon-frontend,mtusk/polymer-starter-kit,markovuksanovic/polymer-starter-kit,SB-Technology-Holdings-International/WateringWebClient,gertcuykens/polymer-starter-kit,RoyKoh/Project-3,semafloor/semafloor-test-alpha,Serious-Rage/poligomy,grebett/polymer-starter-kit,JnJSW/dttdata,alexpaluzzi/polymer-starter-kit,lordoftheflies/mlm-portal,SB-Technology-Holdings-International/Water,Ex-ante-Labs/shopper.ninja,gick/mobile-polymer-starter-2,anthonybrown/polymer-starter-kit,SB-Technology-Holdings-International/WateringWebClient,FaellCarvalho/Geo-Location,SB-Technology-Holdings-International/Water,StartPolymer/polymer-starter-kit,gick/reveries-project,trendystore/store,grebett/polymer-starter-kit,SB-Technology-Holdings-International/Water,semafloor/semafloor-test-alpha,JnJSW/dttdata,FaellCarvalho/Geo-Location,alexpaluzzi/polymer-starter-kit,felixzapata/polymer-starter-kit,plusCubed/pluscubed-site,trendystore/store,markovuksanovic/polymer-starter-kit,flaiker/polymer-starter-kit,gick/mobile-polymer-starter-2,michaetto/f16,Serious-Rage/poligomy,SB-Technology-Holdings-International/WateringWebClient,FaellCarvalho/Geo-Location,JnJSW/dttdata,klarkc/polymer-loopback-starter-kit,Ex-ante-Labs/shopper.ninja,felixzapata/polymer-starter-kit,gertcuykens/polymer-starter-kit,gertcuykens/polymer-starter-kit,michaetto/f16,alexpaluzzi/polymer-starter-kit,mtusk/polymer-starter-kit,gick/reveries-project,semafloor/semafloor-test-alpha,lordoftheflies/mlm-portal