[Net10] [iOS] Enable sizing back/flyout icon with the FontImageSource size property

[kubaflo]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Description of Change

The PR #26016 resolved a sizing issue with excessively large floating icons. However, as a side effect, the Size property of FontImageSource is now ignored, which can be confusing for developers.

For example:

<FontImageSource
         Size="40"
         FontFamily="OpenSansSemibold"
         Glyph="&#x2039;"/>

Even though Size is explicitly set to 40, it's currently not respected.

To reduce confusion and improve developer experience we should restore support for the Size property when it is explicitly specified.

Issues Fixed

Fixes #30946

Before	After

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="Maui.Controls.Sample.DetailPage"
             Shell.ForegroundColor="Red"
             IconImageSource="groceries.png"
             xmlns:local="clr-namespace:Maui.Controls.Sample">
    <Shell.BackButtonBehavior>
        <BackButtonBehavior
            Command="{Binding BackCommand}"
            IsEnabled="True"
            IsVisible="True">
            <BackButtonBehavior.IconOverride>
                <FontImageSource
                    Size="40"
                    FontFamily="OpenSansSemibold"
                    Glyph="&#x2039;"/>
            </BackButtonBehavior.IconOverride>
        </BackButtonBehavior>
    </Shell.BackButtonBehavior>

    <Button
        Text="Navigate"
        Command="{Binding NavigateToAnotherPageCommand}"/>
</ContentPage>

[Copilot]

Pull Request Overview

This PR addresses an issue where back arrows and toolbar icons have become unusually small on iOS. The fix adds proper size handling for font-based icons by checking if a FontImageSource has an explicit size set before applying automatic resizing.

• Adds conditional checks to prevent automatic resizing of FontImageSource icons when they have explicit size properties
• Preserves existing resizing behavior for other image types and FontImageSource without explicit sizing
• Fixes bracket placement and code structure in affected resizing logic

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/ShellPageRendererTracker.cs	Adds FontImageSource size check before resizing toolbar icons and fixes bracket structure
src/Controls/src/Core/Compatibility/Handlers/NavigationPage/iOS/NavigationRenderer.cs	Adds FontImageSource size check before resizing flyout icons with proper bracket structure

[PureWeen]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[PureWeen]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[PureWeen]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).