DocTabs.OnUnselected not called

[matwachich]

Checklist

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

Describe the bug

Closing a docTabItem will not call OnSelected on the next tabItem if this one is located after the closed item.

How to reproduce

Run the provided code, open 2 tabs (tab 1, tab 2)
Selected tab 1, then close it
Tab 2 selected should be called, but it is not.

Screenshots

No response

Example code

package main

import (
	"fmt"

	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/widget"
)

func main() {
	a := app.New()
	w := a.NewWindow("")

	var i int
	docs := container.NewDocTabs()
	docs.CreateTab = func() *container.TabItem {
		i++
		return container.NewTabItem(fmt.Sprintf("tab %03d", i), widget.NewLabel("Tab content"))
	}
	docs.OnSelected = func(ti *container.TabItem) {
		fmt.Println("Tab", ti.Text, "selected")
	}
	docs.OnUnselected = func(ti *container.TabItem) {
		fmt.Println("Tab", ti.Text, "unselected")
	}

	w.SetContent(docs)
	w.ShowAndRun()
}

Fyne version

2.4.5

Go compiler version

1.20.14

Operating system and version

Windows 10

Additional Information

Another idea to be discussed: shouldn't be OnUnselected called when closing a tabItem?