* Debugger nodes and canvas got 'glued' permanently to the mouse if the mouse up event was not recieved by the element that is being dragged. 
* Debugger nodes and canvas got 'glued' permanently to the mouse if the mouse up event was not recieved by the element that is being dragged. 

chbfiv/fabric-engine-old,chbfiv/fabric-engine-old,errordeveloper/fe-devel,errordeveloper/fe-devel,chbfiv/fabric-engine-old,chbfiv/fabric-engine-old,chbfiv/fabric-engine-old,chbfiv/fabric-engine-old,errordeveloper/fe-devel,errordeveloper/fe-devel,chbfiv/fabric-engine-old,errordeveloper/fe-devel,errordeveloper/fe-devel,errordeveloper/fe-devel