fix(state): use flag to determine which states to restore instead of simply save and restore

src/echarts.ts

@@ -1826,21 +1826,14 @@ class ECharts extends Eventful {
             });
         };
 
-        interface DisplayableWithStatesHistory extends Displayable {
-            __prevStates: string[]
-        };
         // Clear states without animation.
         // TODO States on component.
         function clearStates(model: ComponentModel, view: ComponentView | ChartView): void {
             view.group.traverse(function (el: Displayable) {
                 // TODO If el is incremental.
                 if (el.hasState()) {
-                    (el as DisplayableWithStatesHistory).__prevStates = el.currentStates;
                     el.clearStates();
                 }
-                else if ((el as DisplayableWithStatesHistory).__prevStates) {
-                    (el as DisplayableWithStatesHistory).__prevStates = null;
-                }
 
                 const textContent = el.getTextContent();
                 const textGuide = el.getTextGuideLine();
@@ -1862,11 +1855,6 @@ class ECharts extends Eventful {
             view.group.traverse(function (el: Displayable) {
                 // Only updated on changed element. In case element is incremental and don't wan't to rerender.
                 if (el.__dirty && el.states && el.states.emphasis) {
-                    const prevStates = (el as DisplayableWithStatesHistory).__prevStates;
-                    // Restore states without animation
-                    if (prevStates) {
-                        el.useStates(prevStates);
-                    }
                     // Update state transition and enable animation again.
                     if (enableAnimation) {
                         graphic.setStateTransition(el, stateAnimationModel);