Filtering by "Rank Achieved: SS" does not work in mania

[AkiraMorilas]

As shown in screenshot, none of my 36 mania SS ranks appear, despite mania being set as my main gamemode.
I am assuming that this is because none of them are lazer SSes(rainbow 300 only)?
Would be nice to get a clarification on whether this is a bug or intentional.

[bdach]

Similarly to ppy/osu-infrastructure#27 I'm not sure what should happen. I see basically two outcomes:

• We say that this is intended because that's how lazer grades work and it's a wontfix
• We add support for filtering on old/new rank based on lazer mode being active (involves changes to osu-queue-score-statistics to store the old rank somewhere, reindexing at least all stable scores, etc.)

[bdach]

@peppy fyi

[nanaya]

adding the legacy rank to index (and updating search field based on lazer mode) is probably enough.

...wait, no, that's not even needed. The rank filtering is done at the last step at the moment.