Fix - react: checkbox column is editable for readonly matrix if showInMultipleColumns is true #2560
Fix - react: checkbox column is editable for readonly matrix if showInMultipleColumns is true #2560

surveyjs/surveyjs,andrewtelnov/surveyjs,andrewtelnov/surveyjs,surveyjs/surveyjs,surveyjs/surveyjs,surveyjs/surveyjs,andrewtelnov/surveyjs