Prevent management struct from keeping a strong reference of menu viewcontroller

Fix custom menu gets retain cycle issue that it doesn't get deallocated

1. The update for being compatible with new devices XR, XS, XS Max
2. Fix top padding issue
3. Upgrade to swift 4.2

. Fixed select item of the default menu delegate doesn't get fired.
. Fixed the disabled menu is able to appear on pan gesture.
. Update example locating set menu.disabled value.
. Shorten functions and properties name.

. Fix UI issue on iphone X
. Adjust cell width depends on the various screen sizes

. Adding tap gesture to dismiss the sidemenu when tapping outside
. Publicizing the sidemenu states when toggling it

. Fixed the default menu no longer appears after continuously toggling it in the short time span.
. Ignores pan gesture takes the same toggle action.
. Fixed several outstanding issues.