The following properties can be edited for the contact:
Phone number(s) with number type
Note: For Exchange/LDAP/Google contacts, only the default number can be edited.
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Status favourite/no favourite
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Status subscription/no subscription (only for operation on a COMtrexx)
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Shows the status: favourite/no favourite (quick adjustment by clicking)
For Exchange, Google or LDAP contacts: Info that local extensions/changes have been made.