Changing username handle can lose synchronization with existing contributions

[rminnett]

Keep a list of handles instead of just one. When editing a handle and when listing private contributions, check against all existing handles (not just the current one).

[njarboe]

Kunpeng Ge kunpeng.ge@yahoo.com also has this problem. His private workspace does not have his public contributions. I asked him to update some data and he is confused about this.