Plus-check for schedule session addition may not be a recognizable pattern

The "plus" symbol on the session page is intended to represent adding the item to a list more accurately than e.g. a star symbol with selected and non-selected states (1). However, as we don't use a floating action button on Android, which would designate it as the main action on the page, and on iOS this is not a common pattern, it may not be clear what the "plus" button does.

To solve this, a more common UI pattern can be used for session addition to "My Schedule", e.g. [1].