Remember friend status filter when reopening friends list panel

[forer-lika777]

The friend status filter resets to "All" every time the friend list panel is reopened, or when switching back from other tabs ("currently online" and "user search").
I created a statusFilter property in DashboardOverlay, which is bound to the current item of streamControl in FriendDisplay to save this setting. Filter setting will still reset to "All" after reopening the whole game.

Changes:

• Added statusFilter to DashboardOverlay
• Exposed StatusFilter bindable in FriendDisplay
• Bound FriendOnlineStreamControl.Current to the shared filter

This is only a small change, so I didn't write any test. (I have manually tested it)

[Joehuu]

Filter setting will still reset to "All" after reopening the whole game.

I think it should save like web and the other settings:

osu/osu.Game/Configuration/OsuConfigManager.cs

Lines 246 to 247 in a3b8b9a

	SetDefault(OsuSetting.DashboardSortMode, UserSortCriteria.LastVisit);
	SetDefault(OsuSetting.DashboardDisplayStyle, OverlayPanelDisplayStyle.Card);

[forer-lika777]

Filter setting will still reset to "All" after reopening the whole game.

I think it should save like web and the other settings:

osu/osu.Game/Configuration/OsuConfigManager.cs

Lines 246 to 247 in a3b8b9a

	SetDefault(OsuSetting.DashboardSortMode, UserSortCriteria.LastVisit);
	SetDefault(OsuSetting.DashboardDisplayStyle, OverlayPanelDisplayStyle.Card);

Well I didn't notice this behavior on the web. I have changed the way the filter setting is saved, just like the sort criteria and display style settings in UserListToolbar.
The game will now remember this setting across all sessions.