MouseWheel properties are equivalent (#2791)

* MouseWheel properties are equivalent

This was never clearly documented. We supported IntelliMouse drivers on Windows 9x systems. `NativeMouseWheelSupport` told you if the OS natively had a mouse wheel installed. `MouseWheelSupport` told you if the OS had a mouse wheel installed OR an IntelliMouse driver was installed to give said support. The driver sent mouse wheel messages on 9x systems, but the OS didn't natively understand what that was.

Also removing the OS comments as they can be confusing and we're long long past those days. :)

* Fix name

Author: JeremyKuhne

xml/System.Windows.Forms/SystemInformation.xml

@@ -3197,7 +3197,6 @@
   
 ## Remarks  
  The <xref:System.Windows.Forms.SystemInformation.MousePresent%2A> property indicates whether a pointing device is present or installed on the system. This is usually the case, so <xref:System.Windows.Forms.SystemInformation.MousePresent%2A> almost always returns `true`.  
-  
    
   
 ## Examples  
@@ -3238,10 +3237,6 @@
   
 ## Remarks  
  The mouse speed determines how far the pointer will move based on the distance the mouse moves. The value of this property ranges between 1 (slowest) and 20 (fastest). A value of 10 is the default. The value can be set by an end user using the mouse control panel application or by an application using the `SystemParametersInfo` function of the Platform SDK.  
-  
-> [!NOTE]
->  This property is supported only on Windows 98, Windows Millennium Edition, Windows 2000, Windows XP, and the Windows Server 2003 family.  
-  
    
   
 ## Examples  
@@ -3281,12 +3276,11 @@
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- The <xref:System.Windows.Forms.SystemInformation.MouseWheelPresent%2A> property indicates whether the system recognizes a mouse wheel on the current mouse.  
-  
+ The <xref:System.Windows.Forms.SystemInformation.MouseWheelPresent%2A> property indicates whether the system recognizes a mouse wheel on an installed mouse.  
+
 > [!NOTE]
->  This property is supported only on Windows NT 4.0 or later, Windows 98, Windows Millennium Edition, Windows 2000, Windows XP, and the Windows Server 2003 family.  
-  
-   
+>  This property is equivalent to <xref:System.Windows.Forms.SystemInformation.NativeMouseWheelSupport%2A>.
+
   
 ## Examples  
  The following code example lists all properties of the <xref:System.Windows.Forms.SystemInformation> class in a <xref:System.Windows.Forms.ListBox> and displays the current value of the property in a <xref:System.Windows.Forms.TextBox> when a list item selected.  
@@ -3405,19 +3399,19 @@
         <ReturnType>System.Boolean</ReturnType>
       </ReturnValue>
       <Docs>
-        <summary>Gets a value indicating whether the operating system natively supports a mouse wheel.</summary>
+        <summary>Gets a value indicating whether a mouse with a mouse wheel is installed.</summary>
         <value>
-          <see langword="true" /> if the operating system natively supports a mouse wheel; otherwise, <see langword="false" />.</value>
+          <see langword="true" /> if a mouse with a mouse wheel is installed; otherwise, <see langword="false" />.</value>
         <remarks>
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- Mouse wheel operations that occur through a <xref:System.Windows.Forms.Control> object work even if the operating system does not natively support the wheel.  
-  
+ The <xref:System.Windows.Forms.SystemInformation.NativeMouseWheelSupport%2A> property indicates whether the system recognizes a mouse wheel on an installed mouse.  
+
 > [!NOTE]
->  This property is supported only on Windows NT 4.0 or later, Windows 98, Windows Millennium Edition, Windows 2000, Windows XP, and the Windows Server 2003 family.  
-  
-   
+>  This property is equivalent to <xref:System.Windows.Forms.SystemInformation.MouseWheelPresent%2A>.
+
+
   
 ## Examples  
  The following code example lists all properties of the <xref:System.Windows.Forms.SystemInformation> class in a <xref:System.Windows.Forms.ListBox> and displays the current value of the property in a <xref:System.Windows.Forms.TextBox> when a list item selected.  
@@ -4615,4 +4609,4 @@
       </Docs>
     </Member>
   </Members>
-</Type>
+</Type>