Improvements to input and input configuration in the GUI. (#849)

* Improvements to input and input configuration in the GUI

* Requested changes

* nits

* more nits

Ryujinx.Common/Configuration/Hid/NpadController.cs

@@ -1,35 +0,0 @@
-namespace Ryujinx.Common.Configuration.Hid
-{
-    public class NpadController
-    {
-        /// <summary>
-        /// Enables or disables controller support
-        /// </summary>
-        public bool Enabled { get; set; }
-
-        /// <summary>
-        /// Controller Device Index
-        /// </summary>
-        public int Index { get; set; }
-
-        /// <summary>
-        /// Controller Analog Stick Deadzone
-        /// </summary>
-        public float Deadzone { get; set; }
-
-        /// <summary>
-        /// Controller Trigger Threshold
-        /// </summary>
-        public float TriggerThreshold { get; set; }
-
-        /// <summary>
-        /// Left JoyCon Controller Bindings
-        /// </summary>
-        public NpadControllerLeft LeftJoycon { get; set; }
-
-        /// <summary>
-        /// Right JoyCon Controller Bindings
-        /// </summary>
-        public NpadControllerRight RightJoycon { get; set; }
-    }
-}