UI - Add Volume Controls + Mute Toggle (F2) (#2871)

* Add the ability to toggle mute in the status bar.

* Add the ability to toggle mute in the status bar.

* Formatting fixes

* Add hotkey (F2) to mute

* Add default hotkey to config.json

* Add ability to change volume via slider.

* Fix Headless

* Fix SDL2 Problem : Credits to d3xMachina

* Remove unnecessary work

* Address gdk comments

* Toggling with Hotkey now properly restores volume to original level.

* Toggling with Hotkey now properly restores volume to original level.

* Update UI to show Volume % instead of Muted/Unmuted

* Clean up the volume ui a bit.

* Undo unintentionally committed code.

* Implement AudRen Support

* Restore intiial volume level in function definition.

* Finalize UI

* Finalize UI

* Use clamp for bounds check

* Use Math.Clamp for volume in soundio

* Address comments by gdkchan

* Address remaining comments

* Fix missing semicolon

* Address remaining gdkchan comment

* Fix comment

* Change /* to //

* Allow volume slider to change volume immediately.
Also force label text to cast to int to prevent decimals from showing in status bar

* Remove blank line

* Undo setting of volume level when "Cancel" is pressed.

* Fix allignment for settings window code

Ryujinx.HLE/HLEConfiguration.cs

@@ -139,6 +139,11 @@ namespace Ryujinx.HLE
         /// </summary>
         public AspectRatio AspectRatio { get; set; }
 
+        /// <summary>
+        /// The audio volume level.
+        /// </summary>
+        public float AudioVolume { get; set; }
+
         /// <summary>
         /// An action called when HLE force a refresh of output after docked mode changed.
         /// </summary>
@@ -164,7 +169,8 @@ namespace Ryujinx.HLE
                                 string                 timeZone,
                                 MemoryManagerMode      memoryManagerMode,
                                 bool                   ignoreMissingServices,
-                                AspectRatio            aspectRatio)
+                                AspectRatio            aspectRatio,
+                                float                  audioVolume)
         {
             VirtualFileSystem      = virtualFileSystem;
             LibHacHorizonManager   = libHacHorizonManager;
@@ -187,6 +193,7 @@ namespace Ryujinx.HLE
             MemoryManagerMode      = memoryManagerMode;
             IgnoreMissingServices  = ignoreMissingServices;
             AspectRatio            = aspectRatio;
+            AudioVolume            = audioVolume;
         }
     }
 }