ui/app: (iOS) treat the \n character as a return key chord

Signed-off-by: Elias Naur <mail@eliasnaur.com>

ui/app/os_ios.go

@@ -148,11 +148,16 @@ func onDeleteBackward(view C.CFTypeRef) {
 }
 
 //export onText
-func onText(view C.CFTypeRef, str *C.char) {
+func onText(view C.CFTypeRef, cstr *C.char) {
 	w := views[view]
-	w.w.event(key.EditEvent{
-		Text: C.GoString(str),
-	})
+	str := C.GoString(cstr)
+	if str != "\n" {
+		w.w.event(key.EditEvent{
+			Text: str,
+		})
+	} else {
+		w.onKeyCommand(key.NameReturn)
+	}
 }
 
 //export onTouch