D7498: Add option to group hidden files and folders at the end

[Chris Holland]

Zren created this revision.
Restricted Application added a subscriber: Konqueror.

REVISION SUMMARY
  Awhile back I patched Dolphin to sort hidden folders below visible files. Eg:
  
  - `Music/`
  - `test.txt`
  - `.git/`
  - `.xsession-errors`
  
  Note, this applies the sort last, so it will keep them at the bottom regardless of what sort is used (filesize/filename/modified/etc).
  
  By default, it uses the old behaviour. You'll have to go to "View > Adjust View Settings > Check Show hidden files last".
  I'm not 100% sure where the "default" view settings is serialized, but from testing it worked fine when you also check "use as default".
  
  There's a closed bug report #333219 labeled as WontFix in 2014 that mentions it's probably not what most people would expect. Recently on reddit, someone asked for the feature so I might as well upload the patch for discussion.
  
  https://www.reddit.com/r/kde/comments/6vcujg/yet_another_support_question_concerning/
  
  F3874221: 2017-08-23___17-29-41.png <https://phabricator.kde.org/F3874221>
  
  F3874270: 2017-08-23___18-53-10.png <https://phabricator.kde.org/F3874270>

TEST PLAN
  - Confirm `QString("").at(0)` doesn't foobar. I'm not sure when this might happen as files typically have a filename, but might be possible via a KIO plugin/scheme?

REPOSITORY
  R318 Dolphin

REVISION DETAIL
  https://phabricator.kde.org/D7498

AFFECTED FILES
  src/kitemviews/kfileitemmodel.cpp
  src/kitemviews/kfileitemmodel.h
  src/settings/dolphin_directoryviewpropertysettings.kcfg
  src/settings/viewpropertiesdialog.cpp
  src/settings/viewpropertiesdialog.h
  src/views/dolphinview.cpp
  src/views/dolphinview.h
  src/views/dolphinviewactionhandler.cpp
  src/views/dolphinviewactionhandler.h
  src/views/viewproperties.cpp
  src/views/viewproperties.h

To: Zren, #dolphin
Cc: #konqueror
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