D29238: Use Standard "Show/Hide Hidden files" shortcuts in directory chooser dialog

[Nathaniel Graham]

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

REVISION SUMMARY
  New standard shortcuts were added in D28802 <https://phabricator.kde.org/D28802> and adopting them replaces the fairly random
  F8 shortcut here.
  
  CCBUG: 262551
  
  Depends on D28802 <https://phabricator.kde.org/D28802>

TEST PLAN
  Open directory chooser dialog from the Add Folder button in the plasma slideshow
  wallpaper dialog and hit Ctrl+H or Alt+.

REPOSITORY
  R135 Integration for Qt applications in Plasma

BRANCH
  use-standard-show-hide-files-shortcuts (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D29238

AFFECTED FILES
  CMakeLists.txt
  src/platformtheme/kdirselectdialog.cpp

To: ngraham, #plasma, #frameworks
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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