D25726: [Icon View] Fix titles of previously opened KCMs bleeding into QML KCMs

[Filip Fila]

filipf created this revision.
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REVISION SUMMARY
  The change in D14580 <https://phabricator.kde.org/D14580> triggered the spawning of an additional header in QML KCMs in icon view mode.
  
  The additional header was the header of the previously opened QWidgets KCM.
  
  Sidebar view doesn't have this issue so I went and found the code that prevents the bug from happening and added it to icon view.

REPOSITORY
  R124 System Settings

BRANCH
  no-double-titles (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D25726

AFFECTED FILES
  icons/IconMode.cpp

To: filipf
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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