[Query Builder] drag and drop refactor without DOM manipulations - 19.1.x#15537

ChronosSF merged 54 commits into

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ipetrov/query-builder-drag-and-drop-refactor-remake2-19.1.xIgniteUI/igniteui-angular:ipetrov/query-builder-drag-and-drop-refactor-remake2-19.1.xCopy head branch name to clipboard