Added header when generating schema for advanced filtering on HGrid for 19.2.x#16218

dkamburov merged 3 commits into19.2.xIgniteUI/igniteui-angular:19.2.xfrom

mtihova/fix-16214-19.2.xIgniteUI/igniteui-angular:mtihova/fix-16214-19.2.xCopy head branch name to clipboard