tdf#92517 KDE4-FileDialog: "Save as" has wrong Filter

Fixing follow
 - The order of calling: first should be set the filter, after
   that can be set the current filter
 - change the function from "setCurrentFilter" to "setCurrentItem"
   When you set the filter over "setCurrentFilter" you need the full
   search string "extention|description" e.g. "*.docx|Microsoft Word.."
-  Not need the escape of slash (with that can not find
   "Microsoft Word 2007/2010 XML (.docx))"

Change-Id: Ie4f7d6fd619b391487ee944c3e745c855600ee54
Reviewed-on: https://gerrit.libreoffice.org/16721Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>
(cherry picked from commit a93cfd5a)
Reviewed-on: https://gerrit.libreoffice.org/16890Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

vcl/unx/kde4/KDE4FilePicker.cxx

@@ -250,6 +250,10 @@ sal_Int16 SAL_CALL KDE4FilePicker::execute()
 
     _dialog->clearFilter();
     _dialog->setFilter(_filter);
+
+    if(!_currentFilter.isNull())
+        _dialog->filterWidget()->setCurrentItem(_currentFilter);
+
     _dialog->filterWidget()->setEditable(false);
 
     VCLKDEApplication::preDialogSetup();
@@ -384,9 +388,7 @@ void SAL_CALL KDE4FilePicker::setCurrentFilter( const OUString &title )
         return Q_EMIT setCurrentFilterSignal( title );
     }
 
-    QString t = toQString(title);
-    t.replace("/", "\\/");
-    _dialog->filterWidget()->setCurrentFilter(t);
+    _currentFilter = toQString(title);
 }
 
 OUString SAL_CALL KDE4FilePicker::getCurrentFilter()
@@ -633,6 +635,7 @@ void SAL_CALL KDE4FilePicker::initialize( const uno::Sequence<uno::Any> &args )
     }
 
     _filter.clear();
+    _currentFilter.clear();
 
     // parameter checking
     uno::Any arg;

vcl/unx/kde4/KDE4FilePicker.hxx

@@ -66,6 +66,8 @@ protected:
 
     //running filter string to add to dialog
     QString _filter;
+    // string to set the current filter
+    QString _currentFilter;
 
     //mapping of SAL control ID's to created custom controls
     QHash<sal_Int16, QWidget*> _customWidgets;