[web] add notifications info to tokeninfo pane

internal/server/handlers.go

internal/server/web/partials/calendar-listing.mustache

internal/server/web/partials/notifications-info.mustache

internal/server/web/partials/scripts.mustache

...ver/web/partials/settings-notifications-calendar.mustache

internal/server/web/partials/settings-notifications.mustache

internal/server/web/partials/tokeninfo.mustache

internal/server/web/static/js/notifications.js

internal/server/web/static/js/settings-notifications.js

internal/server/web/static/js/settings.js

internal/server/web/static/js/tokeninfo-status.js

internal/utils/templating/keys.go