render HP bar below the HQ

src/ui/GameWorldView.h

@@ -120,6 +120,8 @@ private:
     void drawBeltItems(QPainter& painter);
     void drawScrap(QPainter& painter);
     void drawShips(QPainter& painter);
+    void drawHpBar(QPainter& painter, qreal left, qreal top, qreal width,
+                   float fraction, bool isEnemy);
     void drawDebugSensorRanges(QPainter& painter);
     void drawDebugTargetLines(QPainter& painter);
     void drawDebugOverlay(QPainter& painter);