ContextMenu behind Button using GridLayout

[Chadial]

Describe the bug
If the ContextMenu ist used with an GridLayout (maybe also BoxLayout) and a following Button,
the ContextMenu "Popup" is behind the Button.

Code

import kivy
from kivy.app import App
from kivy.lang import Builder
import kivy.garden.contextmenu

kv = """
GridLayout:
    id: layout
    cols: 1
    AppMenu:
        id: app_menu
        top: root.height
        cancel_handler_widget: layout

        AppMenuTextItem:
            text: "Menu #1"
            ContextMenu:
                ContextMenuTextItem:
                    text: "Item #11"

    Button:
        text:   "hello"
"""

class MyApp(App):
    def build(self):
        self.title = 'Simple app menu example'
        return Builder.load_string(kv)

    def say_hello(self, text):
        print(text)
        self.root.ids['app_menu'].close_all()

if __name__ == '__main__':
    MyApp().run()

Expected behavior
I expected the menu appearing in front of all widgets.

Platform (please complete the following information):

• OS: Windows 7
• Python 3.6.
• kivy-garden /contextmenu 0.1.0.dev1

Additional context
Add any other context about the problem here.

[lightningorb]

Same issue

[lightningorb]

Here's a fix, on the parent widget call:

self.children = self.children[::-1]

[avyrodov]

Here's a fix, on the parent widget call:

self.children = self.children[::-1]

Hi, I ran into a problem, but I don't understand where to add this line, no matter where I add it to the parent, the drop-down menu is still hiding behind other widgets on the screen.