Update userguide on multiple criteria
Update userguide on multiple criteria

Change wording, add an example for multiple criteria and move
the sentence explaining the Firefox example into the code listing
block.

drbig/i3,stapelberg/i3,yin/i3,acrisci/i3,Zopieux/i3,strake/i3,pablospe/i3,dg-ratiodata/i3,isharp/i3,pronobis/i3,EvilPudding/i3,drbig/i3,dg-ratiodata/i3,EvilPudding/i3,netzverweigerer/i3,stapelberg/i3,mariusmuja/i3wm,gnomus/i3-wm-gap,yin/i3,tcreech/i3,renlinx007/i3wm,Azkae/i3,saksham0808/i3,drbig/i3,Matmusia/i3,simonnagl/i3,Airblader/i3-original,MForster/i3,FauxFaux/i3,isharp/i3,strake/i3,cornerman/i3,Airblader/i3,MForster/i3,tcreech/i3,stapelberg/i3,cornerman/i3,netzverweigerer/i3,mariusmuja/i3wm,jubalh/i3,simonnagl/i3,MForster/i3,renlinx007/i3wm,Airblader/i3,mh21/i3,sa1/i3,ccryx/i3,Airblader/i3-original,Chr1stoph/i3,Airblader/i3,dg-ratiodata/i3,jubalh/i3,acrisci/i3,Azkae/i3,sa1/i3,gnomus/i3-wm-gap,Azkae/i3,i3/i3,EvilPudding/i3,pablospe/i3,smrt28/i3,sideffect0/i3wm,isharp/i3,shdown/i3,mh21/i3,Zopieux/i3,cornerman/i3,pronobis/i3,saksham0808/i3,mh21/i3,mh21/i3,pablospe/i3,avrelaun/i3,EvilPudding/i3,ccryx/i3,simonnagl/i3,Matmusia/i3,saksham0808/i3,Azkae/i3,renlinx007/i3wm,sideffect0/i3wm,yin/i3,stapelberg/i3,acrisci/i3,FauxFaux/i3,strake/i3,shdown/i3,saksham0808/i3,smrt28/i3,Kaligule/i3,ccryx/i3,MForster/i3,gnomus/i3-wm-gap,strake/i3,i3/i3,sa1/i3,strake/i3,cornerman/i3,Chr1stoph/i3,i3/i3,avrelaun/i3,jubalh/i3,Airblader/i3-original,simonnagl/i3,Airblader/i3,tcreech/i3,renlinx007/i3wm,FauxFaux/i3,Matmusia/i3,ccryx/i3,isharp/i3,sideffect0/i3wm,Zopieux/i3,yin/i3,pablospe/i3,gnomus/i3-wm-gap,shdown/i3,Chr1stoph/i3,dg-ratiodata/i3,pronobis/i3,FauxFaux/i3,avrelaun/i3,Matmusia/i3,sa1/i3,pronobis/i3,tcreech/i3,Kaligule/i3,Kaligule/i3,mariusmuja/i3wm,avrelaun/i3,Chr1stoph/i3,smrt28/i3,i3/i3,sideffect0/i3wm,Zopieux/i3,jubalh/i3,netzverweigerer/i3,acrisci/i3,Airblader/i3-original,mariusmuja/i3wm,netzverweigerer/i3,shdown/i3,drbig/i3,Airblader/i3-original,Kaligule/i3,smrt28/i3,acrisci/i3