Drag and drop: after the call to dragEnter there should be an immediate call to dragOver

[te-netronic]

I'm using ext-dnd. When I move the mouse cursor slowly between the nodes, on one pixel the cursor does show as a universal drop cursor instead of showing the forbidden or allowed cursor. This is also visible on the standard Fancytree examples. This happens always when a new FancytreeNode reprentation is entered. Technical, a call to the "over" command is missing directly after the "enter" command.

Suggestion for a bug fix: I think, that the removal of the "break;" command after handling the "enter" in the _onDragEvent of jquery.fancytree.dnd.js should work. Or at the caller, the call of the "enter" command should immediately be followed by a call to the "over" command.