QmlJSDebugger: Show filename/line number also for enabled breakpoints

Hitting a breakpoint automatically acknowledges it, and from then on
bpFileName, bpLineNumber are used in the Breakpoints pane instead of
fileName, lineNumber.

Task-number: QTCREATORBUG-2759
Reviewed-by: Christiaan Janssen

src/plugins/debugger/qml/qmlengine.cpp

@@ -683,6 +683,8 @@ void QmlEngine::messageReceived(const QByteArray &message)
                 if (processedFilename == file
                         && data->lineNumber == line) {
                     data->pending = false;
+                    data->bpFileName = file;
+                    data->bpLineNumber = line;
                     data->updateMarker();
                 }
             }