Window -> Zoom menu item missing

The menu item Window -> Zoom is missing. In most Mac apps, clicking this menu item is equivalent to clicking the green button to toggle between maximized/restored window size of the focused window.

I need this because I set a keyboard shortcut for All Applications with menu item name Zoom and shortcut key cmd+m. This is because I never use minimize window feature and decided to map its shortcut key to zoom instead as I maximize most windows which are not already maximized.

Even if there is a menu item by a different name which performs the same function, it's okay as I could add a special keyboard shortcut for LibreOffice.app mapping cmd+m to that menu item name.