[SAC] [OSGeo] #1755: Add confirmation step to user edit email change

#1755: Add confirmation step to user edit email change
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Reporter: strk | Owner: sac@…
     Type: task | Status: new
Priority: normal | Milestone:
Component: Systems Admin | Keywords: ldap
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At the moment a user can change her email w/out the new email being
confirmed. This is not acceptable now that we require confirmation of the
initial email (see #1665)

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/1755&gt;
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