D29333: Don't show an empty error dialog when canceling the sync password prompt

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: filipf, davidedmundson, Plasma.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  BUG: 420855
  FIXED-IN: 5.18.5

TEST PLAN
  Click on the Sync button in the SDDM KCM and cancel the password dialog -> no empty
  error dialog shown now
  
  SYncing still works

REPOSITORY
  R123 SDDM Configuration Panel (KCM)

BRANCH
  dont-badget-user-with-empty-error-dialog (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D29333

AFFECTED FILES
  src/advancedconfig.cpp

To: ngraham, filipf, davidedmundson, #plasma
Cc: plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, ragreen, ZrenBot, ngraham, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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