TokenizingTextBox needs a GetIsAutoSuggestTextBoxFocused() method

[minesworld]

Describe the bug

There is no way to act on TokenizingTextBox GotFocus event handler to fill its SuggestedItems if its AutoSuggestBox got the focus.

Adding

TokenizingTextBox.cs

    public bool GetIsAutoSuggestTextBoxFocused()
    {
        return !(GetFocusedElement() is TokenizingTextBoxItem);
    }

will give us this possibility...

Steps to reproduce

s.o.

Expected behavior

Being able to suggest the user items without having him to enter any character...

Screenshots

No response

Code Platform

• [ ] UWP
• [ ] WinAppSDK / WinUI 3
• [ ] Web Assembly (WASM)
• [ ] Android
• [ ] iOS
• [ ] MacOS
• [ ] Linux / GTK

Windows Build Number

• [ ] Windows 10 1809 (Build 17763)
• [ ] Windows 10 1903 (Build 18362)
• [ ] Windows 10 1909 (Build 18363)
• [ ] Windows 10 2004 (Build 19041)
• [ ] Windows 10 20H2 (Build 19042)
• [ ] Windows 10 21H1 (Build 19043)
• [ ] Windows 10 21H2 (Build 19044)
• [ ] Windows 10 22H2 (Build 19045)
• [ ] Windows 11 21H2 (Build 22000)
• [ ] Other (specify)

Other Windows Build number

No response

App minimum and target SDK version

• [ ] Windows 10, version 1809 (Build 17763)
• [ ] Windows 10, version 1903 (Build 18362)
• [ ] Windows 10, version 1909 (Build 18363)
• [ ] Windows 10, version 2004 (Build 19041)
• [ ] Windows 10, version 2104 (Build 20348)
• [ ] Windows 11, version 22H2 (Build 22000)
• [ ] Other (specify)

Other SDK version

No response

Visual Studio Version

No response

Visual Studio Build Number

No response

Device form factor

No response

Additional context

No response

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