Merge branch 'release/21.08'

diff --cc src/dolphinmainwindow.cpp
index e0d6c472573655b6f3387bfc82675f8eaf224025,3966a08fe3221b558d1b7947178fae26ee39825a..ec15bb978a0b012d57feaf9abdcaa45018bf9fd3
--- 1/src/dolphinmainwindow.cpp
--- 2/src/dolphinmainwindow.cpp
+++ b/src/dolphinmainwindow.cpp
@@@ -214,6 -214,11 +214,9 @@@ DolphinMainWindow::DolphinMainWindow() 
      connect(&m_fileItemActions, &KFileItemActions::error, this, [this](const QString &errorMessage) {
          showErrorMessage(errorMessage);
      });
 -#endif
+ 
+     connect(GeneralSettings::self(), &GeneralSettings::splitViewChanged,
+             this, &DolphinMainWindow::slotSplitViewChanged);
  }
  
  DolphinMainWindow::~DolphinMainWindow()