Comment 1 for bug 1153487

Here is how it will work:

- user drags a free point over another point and hold it over it for about 2000ms to trigger the merge operation
- Dr. Geo merges this free point to the other point: all children of the free point are now children of the other point
- Dr. Geo does not ask for confirmation, it is an expert feature for quick redesign. A dialog only shows up for disambiguation
- Dr. Geo issues a command for the command manager, so the merge is undo-able.