AG-NONE Fix eslint errors

```
Member 'isDragMoving' is never reassigned; mark it as `readonly`  @typescript-eslint/prefer-readonly
End this switch case with an unconditional break, continue, return or throw statement  sonarjs/sonar-no-fallthrough
Expected a 'break' statement before 'case'                                             no-fallthrough
```

packages/ag-charts-community/src/chart/interaction/regionManager.ts

@@ -232,6 +232,12 @@ export class RegionManager {
             event.sequence = widgetEvent.sequence;
         }
 
+        if (event.type === 'drag-start') {
+            this.isDragMoving = true;
+        } else if (event.type === 'drag-end') {
+            this.isDragMoving = false;
+        }
+
         this.debug('Dispatching region event: ', event);
         this.allRegionsListeners.dispatch(event.type, event);
         current.listeners.dispatch(event.type, event);

packages/ag-charts-community/src/widget/widgetListenerInternal.ts

@@ -207,13 +207,15 @@ export class WidgetListenerInternal {
                     handler: initClickSequencing(target, this.endSequencedClick.bind(this)),
                 };
                 this.clickSequencing.listeners.push(handler);
+                break;
             }
             case 'sequenced-dblclick': {
                 this.dblClickSequencing ??= {
                     listeners: [],
                     handler: initDblClickSequencing(target, this.endSequencedDblClick.bind(this)),
                 };
                 this.dblClickSequencing.listeners.push(handler);
+                break;
             }
         }
     }