Fix:

when in a lower level, and search to an item that matches higher - the model navigates up - but the nav buttons dont change!!!!
this leads to a crash when press nav button!
   e.g. Im/
          Final Front../
            El Dorado...
        A/
           B

        If we are in 'B' and type 'Dorado' then we change to 'Im' - but nav buttons do not!

models/dirviewproxymodel.cpp

@@ -28,7 +28,8 @@
 #include "dirviewitemfile.h"
 #include "dirviewproxymodel.h"
 
-DirViewProxyModel::DirViewProxyModel(QObject *parent) : QSortFilterProxyModel(parent)
+DirViewProxyModel::DirViewProxyModel(QObject *parent)
+    : ProxyModel(parent)
 {
     setDynamicSortFilter(true);
     setFilterCaseSensitivity(Qt::CaseInsensitive);
@@ -75,6 +76,9 @@ bool DirViewProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourc
     if (filterRegExp().isEmpty()) {
         return true;
     }
+    if (!isChildOfRoot(sourceParent)) {
+        return true;
+    }
 
     const QModelIndex index = sourceModel()->index(sourceRow, 0, sourceParent);
     DirViewItem *item = static_cast<DirViewItem *>(index.internalPointer());