Shift+Ctrl+Z now works for redo

textinput.go

@@ -159,6 +159,7 @@ func (this *TextInput) Redo () {
 // Type types a character at the current dot position.
 func (this *TextInput) Type (char rune) {
 	dot := this.Dot()
+	this.historySwapDot()
 	this.text, dot = text.Type(this.text, dot, rune(char))
 	this.Select(dot)
 	this.box.SetText(string(this.text))
@@ -247,7 +248,7 @@ func (this *TextInput) handleKeyDown (key input.Key, numpad bool) bool {
 	case key.Printable() && !modifiers.Control:
 		typeRune()
 		return true
-	case key == 'z' && modifiers.Control:
+	case key == 'z' || key == 'Z' && modifiers.Control:
 		if modifiers.Shift {
 			this.Redo()
 		} else {