[patch] add 2 new whats-this to editgrp.cpp

[fabian2_de]

Today I've looked for the info, what "Default Group" in the group edit dialog does mean. Recently I figured out, what its meanig is.. I think it's not that sensefull to give the info by clicking on the button itself, but rather by clicking on the textfield....

in file: /plugins/qt-gui/src/editgrp.cpp
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>   QWhatsThis::add(nfoDefault, tr("The default group to start up in."));
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>   QWhatsThis::add(nfoNewUser, tr("The group to which new users will be automatically added.  All new users will be in the local system group New Users but for server side storage will also be stored in the specified group."));

As one can see, it uses the default translation as well. In my mind there is no need for an extra string.

[erijo]

Committed in r4748.