Fix upnext, refactor avatar menu, add to playlist overflow

client/src/app/+accounts/accounts.component.html

client/src/app/menu/avatar-notification.component.html

client/src/app/menu/avatar-notification.component.scss

client/src/app/menu/menu.component.html

client/src/app/menu/menu.component.scss

client/src/app/shared/misc/utils.ts

...hared/video-playlist/video-add-to-playlist.component.html

...hared/video-playlist/video-add-to-playlist.component.scss

...nt/src/app/videos/+video-watch/video-watch.component.html

...nt/src/app/videos/+video-watch/video-watch.component.scss

client/src/app/videos/+video-watch/video-watch.component.ts

client/src/assets/player/upnext/upnext-plugin.ts

client/src/sass/player/upnext.scss