Support for global:: in xmlns of UX

Feature Suggestions
1

Hi,

When I do this:

<App Theme="Basic" xmlns="global::,Fuse,Fuse.Controls">
    <Fuse.Controls.Button />
</App>

I get this:

MainView.ux: FATAL E0000: Invalid URL namespace: 'global::'. The only supported URL namespaces are:

        - http://schemas.fusetools.com/ux

?: FatalError E0000: Invalid URL namespace: 'global::'. The only supported URL namespaces are:

        - http://schemas.fusetools.com/ux
MainView.ux(1.15): E1201: Expected identifier following 'global::'
/Users/bolav/Fuse/FuseFun/lp/MainView.ux(1,16,1,17): Error E1201: Expected identifier following 'global::'
MainView.ux(5.17): E1114: Expected '{', found '::' after namespace name
/Users/bolav/Fuse/FuseFun/lp/MainView.ux(5,18,5,20): Error E1114: Expected '{', found '::' after namespace name
MainView.ux(5.21): E1108: Unexpected token 'RightCurlyBrace'
/Users/bolav/Fuse/FuseFun/lp/MainView.ux(5,22,5,23): Error E1108: Unexpected token 'RightCurlyBrace'
MainView.ux(2): E8001: Data type not found: Fuse.Controls.Button
/Users/bolav/Fuse/FuseFun/lp/MainView.ux(2,1): Error E8001: Data type not found: Fuse.Controls.Button
MainView.ux(2): E8001: Could not resolve type 'Fuse.Controls.Button'
/Users/bolav/Fuse/FuseFun/lp/MainView.ux(2,1): Error E8001: Could not resolve type 'Fuse.Controls.Button'
(3.12s)

When making replacement components for standard Fuse components this functionality would be good to have.