Fix MinSize calculations in Form layout

Fixes #4471

layout/formlayout.go

@@ -42,6 +42,7 @@ func (f *formLayout) tableCellsSize(objects []fyne.CanvasObject, containerWidth
 	}
 
 	padding := theme.Padding()
+	innerPadding := theme.InnerPadding()
 	lowBound := 0
 	highBound := 2
 	labelCellMaxWidth := float32(0)
@@ -56,7 +57,7 @@ func (f *formLayout) tableCellsSize(objects []fyne.CanvasObject, containerWidth
 
 		labelCell := currentRow[0].MinSize()
 		if _, ok := currentRow[0].(*canvas.Text); ok {
-			labelCell.Width += padding * 4
+			labelCell.Width += innerPadding * 2
 		}
 		labelCellMaxWidth = fyne.Max(labelCellMaxWidth, labelCell.Width)
 

layout/formlayout_test.go

@@ -8,6 +8,7 @@ import (
 	"fyne.io/fyne/v2/canvas"
 	"fyne.io/fyne/v2/layout"
 	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -106,6 +107,13 @@ func TestFormLayout_MinSize(t *testing.T) {
 	expectedRowWidth := 70 + 120 + theme.Padding()
 	expectedRowHeight := 100 + 80 + theme.Padding()
 	assert.Equal(t, fyne.NewSize(expectedRowWidth, expectedRowHeight), layoutMin)
+
+	text := canvas.NewText("Text", color.Black)
+	value := widget.NewLabel("Text")
+	l = layout.NewFormLayout()
+	layoutMin = l.MinSize([]fyne.CanvasObject{text, value})
+	// check that the text minsize is padded to match a label
+	assert.Equal(t, value.MinSize().Width*2+theme.Padding(), layoutMin.Width)
 }
 
 func TestFormLayout_MinSize_Hidden(t *testing.T) {