Caret position lost when resizing a MultilineEntry

[matwachich]

To Reproduce:

1. Run the example
2. Position the caret somewhere in the text
3. Resize the window
4. Try to type something and see the changed caret position

Example code:

package main

import (
	lorem "github.com/drhodes/golorem"

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

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

	e := widget.NewMultiLineEntry()
	e.Wrapping = fyne.TextWrapWord
	e.SetText(lorem.Paragraph(10, 15))

	w.SetContent(e)
	w.ShowAndRun()
}

Device (please complete the following information):

• OS: Windows 10
• Version: 10.0.18363.2212
• Go version: 1.18.2
• Fyne version: 2.1.4

[andydotxyz]

Resolved on develop branch ready for release