This should fix most icon scaling issues

Improved the IniReader a bit and replaced some old code.

GreenshotPlugin/Core/Enums/DialogDpiChangeBehaviors.cs

@@ -0,0 +1,34 @@
+// Copyright (c) Dapplo and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+using System;
+
+namespace GreenshotPlugin.Core.Enums
+{
+    /// <summary>
+    ///    In Per Monitor v2 contexts, dialogs will automatically respond to DPI changes by resizing themselves and re-computing the positions of their child windows (here referred to as re-layouting). This enum works in conjunction with SetDialogDpiChangeBehavior in order to override the default DPI scaling behavior for dialogs.
+    ///    This does not affect DPI scaling behavior for the child windows of dialogs(beyond re-layouting), which is controlled by DIALOG_CONTROL_DPI_CHANGE_BEHAVIORS.
+    /// </summary>
+    [Flags]
+    public enum DialogDpiChangeBehaviors
+    {
+        /// <summary>
+        ///    The default behavior of the dialog manager. In response to a DPI change, the dialog manager will re-layout each control, update the font on each control, resize the dialog, and update the dialog's own font.
+        /// </summary>
+        Default = 0,
+
+        /// <summary>
+        ///     Prevents the dialog manager from responding to WM_GETDPISCALEDSIZE and WM_DPICHANGED, disabling all default DPI scaling behavior.
+        /// </summary>
+        DisableAll = 1,
+
+        /// <summary>
+        ///     Prevents the dialog manager from resizing the dialog in response to a DPI change.
+        /// </summary>
+        DisableResize = 2,
+
+        /// <summary>
+        ///     Prevents the dialog manager from re-layouting all of the dialogue's immediate children HWNDs in response to a DPI change.
+        /// </summary>
+        DisableControlRelayout = 3
+    }
+}