Adds warning suppression and slight explanatory comment for global css selector.
Adds warning suppression and slight explanatory comment for global css selector.

rtibbles/kolibri,ralphiee22/kolibri,jtamiace/kolibri,mrpau/kolibri,christianmemije/kolibri,jayoshih/kolibri,jonboiser/kolibri,learningequality/kolibri,DXCanas/kolibri,ralphiee22/kolibri,learningequality/kolibri,lyw07/kolibri,learningequality/kolibri,DXCanas/kolibri,MingDai/kolibri,whitzhu/kolibri,jtamiace/kolibri,lyw07/kolibri,jamalex/kolibri,indirectlylit/kolibri,rtibbles/kolibri,66eli77/kolibri,66eli77/kolibri,mrpau/kolibri,indirectlylit/kolibri,aronasorman/kolibri,66eli77/kolibri,MingDai/kolibri,whitzhu/kolibri,jamalex/kolibri,christianmemije/kolibri,DXCanas/kolibri,lyw07/kolibri,MingDai/kolibri,jonboiser/kolibri,benjaoming/kolibri,aronasorman/kolibri,learningequality/kolibri,mrpau/kolibri,jamalex/kolibri,christianmemije/kolibri,lyw07/kolibri,DXCanas/kolibri,MingDai/kolibri,indirectlylit/kolibri,mrpau/kolibri,jtamiace/kolibri,rtibbles/kolibri,benjaoming/kolibri,indirectlylit/kolibri,ralphiee22/kolibri,jayoshih/kolibri,whitzhu/kolibri,jonboiser/kolibri,jonboiser/kolibri,jamalex/kolibri,christianmemije/kolibri,jtamiace/kolibri,jayoshih/kolibri,66eli77/kolibri,whitzhu/kolibri,jayoshih/kolibri,aronasorman/kolibri,ralphiee22/kolibri,benjaoming/kolibri,aronasorman/kolibri,benjaoming/kolibri,rtibbles/kolibri