Now that we have some test data, it wasn't showing up in the leaderboards tab; this fixes it to ensure (1) that the right ID is being passed to UpdateRow and (2) the map of leaderboard entries is being populated correctly.
rc_client provides basic sorting buckets as a possible option when retrieving the list of achievements or leaderboards; this enables them and labels them in the dialog.
UpdateData in AchievementsWindow now only updates the components being requested, massively improving the window's performance. The parameter is UpdatedItems in AchievementManager, which tracks which portions of the system have been updated for every update callback.
Similarly to the Progress widget (though without the separate object for each box, because each Leaderboard unit is just three text fields stacked vertically), AchievementLeaderboardWidget.UpdateData will now accept three options: destroy all and rebuild, update all, or update a set of rows.
As part of this, AchievementManager::GetLeaderboardsInfo has been refactored to GetLeaderboardInfo to return a single leaderboard for the ID passed in.
A new tab is added to the Achievements dialog to chart out the leaderboards in a table. Each row of the table contains the leaderboard information and up to four relevant entries, varying based on how many entries are in the leaderboard, whether or not the player has a submitted score, and where in the leaderboard the player's score is.
LillyJadeKatrin