ToolbarItem behavior with ImageSource iOS - fix (#28833)

* ToolbarItem behavior with ImageSource iOS - fix

* Added snapshots

Author: kubaflo

src/Controls/src/Core/Compatibility/iOS/Extensions/ToolbarItemExtensions.cs

@@ -112,7 +112,9 @@ void UpdateIconAndStyle(ToolbarItem item)
 					}
 					item.IconImageSource.LoadImage(mauiContext, result =>
 					{
-						Image = result?.Value;
+						Image = item.IconImageSource is not FontImageSource
+							? result?.Value.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
+							: result?.Value;
 						Style = UIBarButtonItemStyle.Plain;
 					});
 				}

src/Controls/tests/TestCases.Android.Tests/snapshots/android/ToolbarItemShouldBeCorrectlyRendered.png

@@ -0,0 +1,36 @@
+namespace Maui.Controls.Sample.Issues
+{
+
+	[Issue(IssueTracker.Github, 28822, "ToolbarItem behavior with ImageSource iOS", PlatformAffected.iOS)]
+	public class Issue28822NavigationPage : NavigationPage
+	{
+		public Issue28822NavigationPage() : base(new Issue28822()) { }
+		
+		public class Issue28822 : ContentPage
+		{
+			public Issue28822()
+			{
+				ToolbarItems.Add(new ToolbarItem()
+				{
+					IconImageSource = ImageSource.FromFile("dotnet_bot.png"),
+				});
+
+				ToolbarItems.Add(new ToolbarItem()
+				{
+					IconImageSource = new FontImageSource()
+					{
+						Glyph = "+",
+						Color = Colors.Red,
+						Size = 20,
+					}
+				});
+
+				Content = new Label()
+				{
+					Text = "Hello, World!",
+					AutomationId = "HelloWorldLabel"
+				};
+			}
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue28822.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue28822 : _IssuesUITest
+	{
+		public Issue28822(TestDevice testDevice) : base(testDevice)
+		{
+		}
+
+		public override string Issue => "ToolbarItem behavior with ImageSource iOS";
+
+		[Test]
+		[Category(UITestCategories.ToolbarItem)]
+		public void ToolbarItemShouldBeCorrectlyRendered()
+		{
+			App.WaitForElement("HelloWorldLabel");
+			VerifyScreenshot();
+		}
+	}
+}