fix(all): memory leaks

fixes #10459
fixes #10416
fixes #10286

src/components/action-sheet/action-sheet-component.ts

@@ -183,6 +183,7 @@ export class ActionSheetCmp {
 
   ngOnDestroy() {
     assert(this.gestureBlocker.blocked === false, 'gesture blocker must be already unblocked');
+    this.d = null;
     this.gestureBlocker.destroy();
   }
 }

src/components/menu/menu.ts

@@ -516,7 +516,7 @@ export class Menu {
     this.isOpen = isOpen;
     this._isAnimating = false;
 
-    this._events.destroy();
+    this._events.unlistenAll();
     if (isOpen) {
       // Disable swipe to go back gesture
       this._gestureBlocker.block();

src/components/refresher/refresher.ts

@@ -503,6 +503,7 @@ export class Refresher {
    * @private
    */
   ngOnDestroy() {
+    this._events.destroy();
     this._gesture.destroy();
     this._setListeners(false);
   }

src/components/tabs/tabs.ts

@@ -411,6 +411,7 @@ export class Tabs extends Ion implements AfterViewInit {
         if (opts.updateUrl !== false) {
           this._linker.navChange(DIRECTION_SWITCH);
         }
+        assert(this.getSelected() === selectedTab, 'selected tab does not match');
         this._fireChangeEvent(selectedTab);
       });
     } else {
@@ -419,8 +420,6 @@ export class Tabs extends Ion implements AfterViewInit {
   }
 
   _fireChangeEvent(selectedTab: Tab) {
-    assert(this.getSelected() === selectedTab, 'selected tab does not match');
-
     selectedTab.ionSelect.emit(selectedTab);
     this.ionChange.emit(selectedTab);
   }