Fix opening files from search results didn't get the correct encoding.

Patch based on the analysis by Grigory Zagorodnev.

Task-number: 253974

src/libs/utils/filesearch.cpp

@@ -31,7 +31,6 @@
 #include <cctype>
 
 #include <QtCore/QFile>
-#include <QtCore/QDir>
 #include <QtCore/QFutureInterface>
 #include <QtCore/QtConcurrentRun>
 #include <QtCore/QRegExp>
@@ -158,7 +157,7 @@ void runFileSearch(QFutureInterface<FileSearchResult> &future,
                             int n = 0;
                             while (startOfLastLine[i] != '\n' && startOfLastLine[i] != '\r' && i < textLength && n++ < 256)
                                 res.append(startOfLastLine[i++]);
-                            future.reportResult(FileSearchResult(QDir::toNativeSeparators(s), lineNr, QString(res),
+                            future.reportResult(FileSearchResult(s, lineNr, QString(res),
                                                           regionPtr - startOfLastLine, sa.length()));
                             ++numMatches;
                         }
@@ -204,7 +203,7 @@ void runFileSearchRegExp(QFutureInterface<FileSearchResult> &future,
             line = stream.readLine();
             int pos = 0;
             while ((pos = expression.indexIn(line, pos)) != -1) {
-                future.reportResult(FileSearchResult(QDir::toNativeSeparators(s), lineNr, line,
+                future.reportResult(FileSearchResult(s, lineNr, line,
                                               pos, expression.matchedLength()));
                 pos += expression.matchedLength();
             }

src/plugins/find/searchresulttreemodel.cpp

@@ -33,6 +33,7 @@
 
 #include <QtGui/QFont>
 #include <QtGui/QColor>
+#include <QtCore/QDir>
 
 using namespace Find::Internal;
 
@@ -187,7 +188,7 @@ QVariant SearchResultTreeModel::data(const SearchResultFile *file, int role) con
         result = QColor(qRgb(245, 245, 245));
         break;
     case Qt::DisplayRole:
-        result = QString(file->fileName()
+        result = QString(QDir::toNativeSeparators(file->fileName())
             + " (" + QString::number(file->childrenCount()) + ")");
         break;
     case ItemDataRoles::FileNameRole:

src/plugins/find/searchresultwindow.cpp

@@ -153,6 +153,7 @@ void SearchResultWindow::handleJumpToSearchResult(int index, const QString &file
 ResultWindowItem *SearchResultWindow::addResult(const QString &fileName, int lineNumber, const QString &rowText,
     int searchTermStart, int searchTermLength)
 {
+    qDebug()<<"###"<<fileName;
     m_widget->setCurrentWidget(m_searchResultTreeView);
     int index = m_items.size();
     ResultWindowItem *item = new ResultWindowItem;