Fixed not preventing default selection of text when selecting nodes

HISTORY.md

@@ -11,6 +11,7 @@ https://github.com/josdejong/jsoneditor
   when deleting a node.
 - Fixed duplicate and remove of the action menu of multiple selected
   nodes not working.
+- Fixed not preventing default selection of text when selecting nodes.
 
 
 ## 2018-10-08, version 5.24.7

src/js/treemode.js

@@ -1316,6 +1316,7 @@ treemode._onMultiSelectStart = function (event) {
     });
   }
 
+  event.preventDefault();
 };
 
 /**