fix(core): fix #4592.  this in link functions = window, not the directive. I could not find where self.shown was used anywhere so just removed it
fix(core): fix #4592.  this in link functions = window, not the directive.
I could not find where self.shown was used anywhere so just removed it

Servoy/ng-grid,InteractiveIntelligence/ng-grid,ntmuigrid/ntmuigrid,Servoy/ng-grid,dbckr/ui-grid,dbckr/ui-grid,yccteam/ui-grid,kenwilcox/ui-grid,angular-ui/ng-grid,angular-ui/ui-grid,YonatanKra/ui-grid,angular-ui/ui-grid,JLLeitschuh/ui-grid,louwie17/ui-grid,dlgski/ui-grid,InteractiveIntelligence/ng-grid,Cosium/ui-grid,imbalind/ui-grid,louwie17/ui-grid,kenwilcox/ui-grid,angular-ui/ng-grid,YonatanKra/ui-grid,AgDude/ng-grid,imbalind/ui-grid,YonatanKra/ui-grid,imbalind/ui-grid,kamikasky/ui-grid,Servoy/ng-grid,dlgski/ui-grid,ntmuigrid/ntmuigrid,ntmuigrid/ntmuigrid,bjossi86/ui-grid,aw2basc/ui-grid,mportuga/ui-grid,angular-ui/ui-grid,Cosium/ui-grid,bjossi86/ui-grid,JLLeitschuh/ui-grid,Cosium/ui-grid,AgDude/ng-grid,JLLeitschuh/ui-grid,dbckr/ui-grid,aw2basc/ui-grid,kenwilcox/ui-grid,dlgski/ui-grid,bjossi86/ui-grid,InteractiveIntelligence/ng-grid,angular-ui/ng-grid,yccteam/ui-grid,aw2basc/ui-grid,kamikasky/ui-grid,kamikasky/ui-grid,AgDude/ng-grid,yccteam/ui-grid,mportuga/ui-grid,mportuga/ui-grid,louwie17/ui-grid