cleanup tree drag if mouseup was missed due to debugger

node_modules/ace_tree/lib/ace_tree/mouse/drag_handler.js

@@ -161,6 +161,7 @@ function initDragHandlers(mouseHandler) {
     
     mouseHandler.dragEnd = function(e, cancel) {
         if (dragInfo) {
+            window.removeEventListener("mousedown", keyHandler, true);
             window.removeEventListener("keydown", keyHandler, true);
             window.removeEventListener("keyup", keyHandler, true);
             if (dragInfo.el && dragInfo.el.parentNode)
@@ -190,6 +191,8 @@ function initDragHandlers(mouseHandler) {
     };
     
     mouseHandler.dragStart = function() {
+        if (dragInfo)
+            this.dragEnd(null, true);
         mouseHandler.setState("drag");
         tree.renderer.visualizeBlur();
         tree.renderer.setStyle("dragOver", true);
@@ -205,6 +208,7 @@ function initDragHandlers(mouseHandler) {
             return;
         mouseHandler.dragStart();
         
+        window.addEventListener("mousedown", keyHandler, true);
         window.addEventListener("keydown", keyHandler, true);
         window.addEventListener("keyup", keyHandler, true);
         
@@ -267,7 +271,7 @@ function initDragHandlers(mouseHandler) {
     
     function keyHandler(e){
         if (dragInfo) {
-            if (e.keyCode === 27) {
+            if (e.keyCode === 27 || e.type == "mousedown") {
                 mouseHandler.dragEnd(null, true);
                 event.stopEvent(e);
             } else if (dragInfo && e.keyCode == 17 ||  e.keyCode == 18) {