message: View: optimized calcPanelSwipeStyles
diff: @@ -361,6 +361,10 @@ export default class View extends Component {
  const isPrev = panelId === this.state.swipeBackPrevPanel;
  const isNext = panelId === this.state.swipeBackNextPanel;
  + if (!isPrev && !isNext || this.state.swipingBackFinish !== null) {
  + return {};
  + }
  +
  let prevPanelTranslate = `${this.state.swipeBackShift}px`;
  let nextPanelTranslate = `${-50 + (this.state.swipeBackShift * 100 / this.window.innerWidth) / 2}%`;
  let prevPanelShadow = 0.3 * (this.window.innerWidth - this.state.swipeBackShift) / this.window.innerWidth;
  