D25398: Check values have changed before setting the model

[Méven Car]

meven created this revision.
meven added a reviewer: Plasma.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
meven requested review of this revision.

REVISION SUMMARY
  Only save data that needs to be saved and use sanitized data rather than raw text field input.

TEST PLAN
  Edit Username -> have a KPackageKit password verification
  Edit Avatar -> no more password verification popup

REPOSITORY
  R128 User Manager

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D25398

AFFECTED FILES
  src/accountinfo.cpp

To: meven, #plasma
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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