Fixed https://github.com/surveyjs/survey-creator/issues/813 - Missing items editor in dropdown when disable readonly
Fixed https://github.com/surveyjs/survey-creator/issues/813 - Missing items editor in dropdown when disable readonly

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