UIA: fix landscape.io warning - make MenuWrapper._activate method to be static
UIA: fix landscape.io warning - make MenuWrapper._activate method to be static

cetygamer/pywinauto,MagazinnikIvan/pywinauto,airelil/pywinauto,drinkertea/pywinauto,pywinauto/pywinauto,vasily-v-ryabov/pywinauto