use internal, theme-friendly forecast icons
(forecast) png icons by default
(forecast) adjust opacity of alt icons
(forecast) sizing & spacing adjustments
revert nutrition setTimeout hack once root cause has been fixed in core
Merge pull request #1282 from duckduckgo/brian/remove-nutrition-hack

Revert nutrition setTimeout hack
(forecast) icon size and mobile tweaks
(forecast) long summary spacing adjustments
Merge pull request #1281 from duckduckgo/doug/forecast-custom-icons

Forecast - Use Internal Icons