app-wallet component's scroll constantly throws a warning. fix it!

As had been previsouly mentioned, please refactor your scrolling logic. if a property is immutable, then there shouldnt be any reason for it to change!

stencil @Prop() "fadeclass" on <app-wallet> is immutable but was modified from within the component.
More information: https://stenciljs.com/docs/properties#prop-mutability