Inconsistent Validation Status Display on Entry widgets when binding/unbinding

Checklist

[X] I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
[X] This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

When an entry widget is bound with a value for the first time it displays the validation status check mark. However, if you unbind the widget and then rebind it, the validation status check mark is not displayed. In fact, it will never be displayed again with a sequence of unbinding/rebinding operations

How to reproduce

Run the attached code (it will fail the first time due to missing testdata - copy the failed results to the testdata directory and run again - it will work). Now compare afterFirstBindingTestString.xml with afterSecondBindingTestString.xml. The first binding result contains the check box, the second does not.

Screenshots

Example code

package widget

import (
    "testing"
    "time"

    "fyne.io/fyne/v2"
    "fyne.io/fyne/v2/data/binding"
    "fyne.io/fyne/v2/test"
    "fyne.io/fyne/v2/widget"
    "github.com/stretchr/testify/assert"
)

func TestEntryTextSize(t *testing.T) {
    str := binding.NewString()
    str.Set("TestString")
    entry := widget.NewEntry()
    entry.Resize(fyne.NewSize(200, 20))
    entry.SetText("")
    assert.Equal(t, "", entry.Text)
    time.Sleep(100 * time.Millisecond)
    test.AssertObjectRendersToMarkup(t, "beforeBinding.xml", entry)
    entry.Bind(str)
    time.Sleep(100 * time.Millisecond)
    test.AssertObjectRendersToMarkup(t, "afterFirstBindingTestString.xml", entry)
    entry.Unbind()
    entry.SetText("")
    time.Sleep(100 * time.Millisecond)
    test.AssertObjectRendersToMarkup(t, "afterFirstUnbindingTestString.xml", entry)
    entry.Bind(str)
    time.Sleep(100 * time.Millisecond)
    test.AssertObjectRendersToMarkup(t, "afterSecondBindingTestString.xml", entry)
    entry.Unbind()
    entry.SetText("")
    time.Sleep(100 * time.Millisecond)
    test.AssertObjectRendersToMarkup(t, "afterSecondUnbindingTestString.xml", entry)
}

Fyne version

2.3.5

Go compiler version

1.21.0

Operating system and version

Windows 10

Additional Information

No response

fyne-io / fyne