message: Use new delegate Button constructor in PlanetSelectState
diff: @@ -28,7 +28,7 @@ PlanetSelectState::PlanetSelectState() :
  mBgMusic{"music/menu.ogg"},
  mSelect{"sfx/click.ogg"},
  mHover{"sfx/menu4.ogg"},
  - mQuit{"Main Menu"},
  + mQuit{"Main Menu", {this, &PlanetSelectState::onQuit}},
  mReturnState{this},
  PlanetAttributes(parsePlanetAttributes())
  {}
  @@ -75,7 +75,6 @@ void PlanetSelectState::initialize()
  mQuit.size({100, 20});
  mQuit.position({renderer.size().x - 105, 30});
  - mQuit.click().connect(this, &PlanetSelectState::onQuit);
  mPlanetDescription.text("");
  mPlanetDescription.font(constants::FONT_PRIMARY, constants::FONT_PRIMARY_MEDIUM);
  