started timeruler object

app/common/qtversionabstraction.cpp

@@ -0,0 +1,9 @@
+#include "qtversionabstraction.h"
+
+int QFontMetricsWidth(const QFontMetrics* fm, const QString& s) {
+#if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)
+  return fm->width(s);
+#else
+  return fm->horizontalAdvance(s);
+#endif
+}