Fix multiple warnings

src/DesktopMagicPluginAPI/Drawing/FontComparer.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Drawing;
 
@@ -6,6 +7,8 @@ namespace DesktopMagic.Api.Drawing;
 
 internal class FontComparer : IEqualityComparer<Font>
 {
+    private const float Tolerance = 0.01f;
+
     public bool Equals(Font? font1, Font? font2)
     {
         if (font1 is null || font2 is null)
@@ -18,7 +21,7 @@ internal class FontComparer : IEqualityComparer<Font>
             return false;
         }
 
-        if (font1.SizeInPoints != font2.SizeInPoints)
+        if (Math.Abs(font1.SizeInPoints - font2.SizeInPoints) > Tolerance)
         {
             return false;
         }

src/DesktopMagicPluginAPI/Settings/Slider.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 
 namespace DesktopMagic.Api.Settings;
 
@@ -22,6 +23,7 @@ public sealed class Slider : Setting
     /// <summary>
     /// Gets or sets the value assigned to the <see cref="Slider"/> element.
     /// </summary>
+    [SuppressMessage("Major Bug", "S1244:Floating point numbers should not be tested for equality", Justification = "Not applicable here since we want to detect changes in the value.")]
     public double Value
     {
         get => _value;