fix(useStorage): isLoading becoming false before returning value

[kirkwat]

When using the useStorage hook with the isLoading value, I ran into issues because the hook would return isLoading as false before returning a value even if it's present in storage. This fix has been working for me which ensures the value is returned before isLoading becomes false.

(I should also mention that the current isLoading solution works when I'm using smaller values like strings but not when I'm using objects or lists)

Before:

After: