message: Simplify MapViewState::onMouseWheel()
diff: @@ -666,8 +666,7 @@ void MapViewState::onMouseWheel(int /*x*/, int y)
  {
  if (mInsertMode != InsertMode::INSERT_TUBE) { return; }
  - if (y > 0) { mConnections.decrementSelection(); }
  - else { mConnections.incrementSelection(); }
  + y > 0 ? mConnections.decrementSelection() : mConnections.incrementSelection();
  }
  