Draw tool can't erase a bond

[ghutchis]

There's no way to use a draw tool to erase a bond (but leave the atoms intact).

Reported by: @ghutchis

[ghutchis]

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Added bond deletion to the draw tool in svn 650.

Original comment by: dcurtis3

[ghutchis]

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This Tracker item was closed automatically by the system. It was
previously set to a Pending status, and the original submitter
did not respond within 14 days (the time period specified by
the administrator of this Tracker).

Original comment by: sf-robot