Stock Ticker not support Multisite :(

Hi @kendy73,

My priority was to make Stock Ticker working properly on single sites, due to various changes in AlphaVantage.co API and fetching data.

Support for multisite could be restarted in future when I get spare time to further work on multisite version which stuck in alpha state available at GitHub https://github.com/urosevic/stock-ticker/tree/d542c8a680d4beebb13dde7dd7d71a159e501f74

Any help to implement multisite support to latest code available at https://github.com/urosevic/stock-ticker/ is more than welcome (fork, implement, merge request).

Kind regards,
Aleksandar