Improve multi-controller support in HID and Controller Applet (#1453)

* Initial commit

Enable proper LED patterns
Toggle Hotkeys only on focus
Ignore Handheld on Docked mode
Remove PrimaryController
Validate NpadIdType
Rewrite NpadDevices to process config in update loop
Cleanup

* Notify in log periodically when no matched controllers

* Remove duplicate StructArrayHelpers in favor of Common.Memory

Fix struct padding CS0169 warns in Touchscreen

* Remove GTK markup from Controller Applet

Use IList instead of List
Explicit list capacity in 1ms loop
Fix formatting

* Restrict ControllerWindow to show valid controller types

Add selected player name to ControllerWindow title

* ControllerWindow: Fix controller type initial value

NpadDevices: Simplify default battery charge

* Address AcK's comments

Use explicit types and fix formatting

* Remove HashSet for SupportedPlayers

Fixes potential exceptions due to race

* Fix ControllerSupportArg struct packing

Also comes with two revisions of struct for 4/8 players max.

Ryujinx.HLE/HOS/Services/Hid/HidServer/HidUtils.cs

@@ -35,5 +35,19 @@ namespace Ryujinx.HLE.HOS.Services.Hid.HidServer
             PlayerIndex.Unknown  => NpadIdType.Unknown,
             _                    => throw new ArgumentOutOfRangeException(nameof(index))
         };
+
+        public static long GetLedPatternFromNpadId(NpadIdType npadIdType)
+        => npadIdType switch
+        {
+            NpadIdType.Player1  => 0b0001,
+            NpadIdType.Player2  => 0b0011,
+            NpadIdType.Player3  => 0b0111,
+            NpadIdType.Player4  => 0b1111,
+            NpadIdType.Player5  => 0b1001,
+            NpadIdType.Player6  => 0b0101,
+            NpadIdType.Player7  => 0b1101,
+            NpadIdType.Player8  => 0b0110,
+            _                   => 0b0000
+        };
     }
 }