Favorites: phrases and words

[ApayRus]

While user reads materials, he can add phrases and words to Favorites. Then see them in one place. And memorize.

Because phrases can be splitted into too much pieces, there is a need to select several phrases/pieces and join them together, like one phrase. For example, in material you can have separate playable phrases:

1. It is good,
2. but
3. not so good. And you can save it into single one: "It is good but not so good".