Updated uiTreeNode.js. Added isUiTreeRoot = false; in check if it or it's parents has a 'data-nodrag' attribute for preventing become item not clickable after clicking on this item twice.
Updated uiTreeNode.js.
Added isUiTreeRoot = false; in check if it or it's parents has a 'data-nodrag' attribute for preventing become item not clickable after clicking on this item twice.

angular-ui-tree/angular-ui-tree