fix(select): fix duplicate options when using ng-repeat
fix(select): fix duplicate options when using ng-repeat

closes #1643

IRlyDontKnow/material,EladBezalel/material,FrankMeyer/material,gorcz/material,hitesh97/material,DevVersion/material,amithub/Angular-Material-Web-Design,gkalpak/material,m0g/material,HarrisCorp/material,dalong123/material,dreamoftrees/material,programmist/material,dmitriz/material,mightyselva/material,marduke182/material,p5150j/material,nishant8BITS/material,nconrad/material,Patrik-Lundqvist/material,hesling/material,ebulay/material,loic/material,masterpowers/material,pan-long/material,willgum/material_03,NickBolles/material,JayQuerido/material,ilovezy/material,wanmifam/material,b-cuts/material,FrankMeyer/material,jadjoubran/material,daniel-nagy/material,mobinni/material,Antariano/material,miladhamzelou/material,udhayam/material,rschmukler/material,jadjoubran/material,programmersujeet/material,drrezeau/material,jensenbox/material,xale/material,Jeremy017/material,victorivens05/material,crisbeto/material,goodylabs/material,p5150j/material,acoreyj/material,armst0910/material,JackieWei/material,hayloft/material,NickBolles/material,mightyselva/material,mprentic-harris/material,hitesh97/material,bOOm-X/material,yangjae/material,epelc/material,miaotmac/material,ryancampbell/material,shyndman/material,andreialecu/material,listenlee/material,Teremok/material,arlowhite/material,deerawan/material,clshortfuse/material,ilovezy/material,miaotmac/material,jadjoubran/material,david-gang/material,andreialecu/material,wmehanna/material,DevVersion/material,brian-lewis/material,2947721120/angular-material,marekmicek/material,nantunes/material,tolysz/material,HipsterZipster/material,CarmenPopoviciu/material,willgum/material_03,dkemper01/material,BurovAndrii/material,quietshu/material,Sravyaksr/material,dkemper01/material,wmehanna/material,Antariano/material,mlabieniec/material,franzsilva/material,mattiLeBlanc/material,deerawan/material,Azzurrio/material,daniel-nagy/material,abhijitsinha89/material,EladBezalel/material,vertazzar/material,deerawan/material,hiddestokvis/material,dlochrie/material,robertmesserle/material,Frank3K/material,psaul3/material,kennethcachia/material,Benew/material,aanjna/material,aikalima/material,Sravyaksr/material,miguelcobain/material,paulflo150/material,ServiceManagementGroup/material,amithub/Angular-Material-Web-Design,jeremymwells/material,nantunes/material,david-gang/material,robertmesserle/material,bOOm-X/material,bendroid/material,xale/material,mlabieniec/material,stephen-james/material,Arteaga2k/material,aanjna/material,weiwei695/material,paulflo150/material,mohislm/material,HarrisCorp/material,java02014/material-1,brunoqc/material,tarnas14/material,barryvdh/material,imjoeco/material,izeau/material,ServiceManagementGroup/material,veraksar/material,Zagorakiss/material-1,sscovil/material,BernhardRode/material,HarrisCorp/material,57-Wolve/material,Androguide/material,miladhamzelou/material,taranjeetsapra/material,dreamoftrees/material,Jeremy017/material,rassokhina/material,Arteaga2k/material,psaul3/material,matthewrfindley/material,FrankMeyer/material,jeremymwells/material,Bhavinshah5111/material,mlabieniec/material,Drooids/material,tolysz/material,ilovezy/material,welkinhealth/material,marduke182/material,graingert/material,programmersujeet/material,onumossn/material,mattiLeBlanc/material,calebegg/material,asonni/material,colinskow/material,jensenbox/material,dkemper01/material,antoniosejas/material,victorivens05/material,pan-long/material,garmoshka-mo/material,weebygames/material,stephen-james/material,drrezeau/material,NickBolles/material,mobinni/material,hiteshsuthar/material,ashwathgovind/material,Androguide/material,arush/material,EladBezalel/material,Todd-Werelius/material,57-Wolve/material,weebygames/material,rolandoldengarm/material,BurovAndrii/material,SagarNaliyapara/material,welkinhealth/material,SamDLT/material,weiwei695/material,ServiceManagementGroup/material,stephen-james/material,victorivens05/material,angular/material,jensenbox/material,vurt/material,theZimmee/angular-material,alfirin/material,udhayam/material,davidecavaliere/material,hesling/material,brunoqc/material,Azzurrio/material,davidecavaliere/material,gorcz/material,valery-barysok/material,matthewrfindley/material,willgum/material_03,wisavalite/material,weiwei695/material,imjoeco/material,alfirin/material,kennethcachia/material,AladdinSonni/material,jeremymwells/material,rassokhina/material,Teremok/material,wanmifam/material,hodeyp/material,ByJC/material,arlowhite/material,JayQuerido/material,Sravyaksr/material,veraksar/material,dalong123/material,JsonChiu/material,ashwathgovind/material,ByJC/material,dlochrie/material,Patrik-Lundqvist/material,jianwang195823/material,graingert/material,uistyleguide/uistyleguide.github.io,Bhavinshah5111/material,sandeeppatidar/material,cdriscol/material,matthewrfindley/material,ardas/material,1012/material,kamilkisiela/material,loic/material,garmoshka-mo/material,huoxudong125/material,programmist/material,Jeremy017/material,marpontes/material,iksose/material,amithub/Angular-Material-Web-De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