Minor problems with the leaderboard component

[birdofpreyru]

loading-indicator component is not used correctly, it should be used in the LeaderboardPageContainer when loading the data.
it should not be used in Podium component.

Besides, if there is only 1 or 2 users on leaderboard, the Podium component won't render it properly as it accesses comps[1] and comps[2] directly.

[Oanh-and-only-Oanh]

closing tickets dated 07/11/2017 and back