Better game mode filtering for Multiplayer/Playlists lounge

[mouzedrift]

Describe the new feature:
i would suggest adding a game mode dropdown filter for multiplayer/playlists rather than using the selected game mode icon in the top toolbar.

i personally think this is a lot better and more intuitive since there is no real indicator that its already filtering the lobbys by the game mode. additionally a filter for "all" game modes would be nice to have.

[peppy]

If this is a consideration, then it's basically saying the whole game UX is broken, since those icons are deciding the filter applied to every screen.

[mouzedrift]

perhaps it is since there are additional buttons in some overlays like the ranking one.

or in beatmap listing clicking on the top game mode icons doesn't change the beatmap listing filter.

the only place where you really need them is singleplayer and multiplayer if i didn't forgot something. but if someone would add the "Any" or "All" game mode category for the lounge then it would be for singleplayer only.

[peppy]

@arflyte something to read through / keep in mind.

[arflyte]

Noted.