20201010 js update favicon images

This adds icons for Apple devices, Android devices, and all modern browsers. RAILS default favicon_link_tag helper only supports one .ico file. So additional code was needed to support all.

All icons including android's manifest file are in assets/images/favicon/

References: https://github.com/RealFaviconGenerator/rails_real_favicon/issues/26 https://github.com/RealFaviconGenerator/rails_real_favicon/issues/35