Animated banners are not displayed properly

[DestructivForce]

Mastery banners are displayed in game with an animation, but the API only gives the image that drifts up and to the right as part of the animation.

[DestructivForce]

Currently, mastery banners cause a player's page to lose some functionality due to the image covering the page. This issue may be temporarily fixed with #26

[DestructivForce]

Issue found with #26 sizing banners wrong with small screen sizes, #28 temporarily fixes as well without causing said issues.

[DestructivForce]

Updated title to reflect other new animated banners displaying wrongly - ex. the animated opening ceremony (which the api says is stored at https://static-api.nkstatic.com/appdocs/4/assets/opendata/2fe5562a1b0343032706e12950e1a235_banner_openingceremony_animated.png)

Other animated banners show incorrectly for the same reason - the api gives a different type of image back.