Links should support for custom url protocols (`myproto://`)

[jimkring]

Right now, it appears that Link components do not support custom url schemes/protocols (e.g. the myapp:// in myapp://some/parameters) shown below:

This doesn't work...

from fastui import components as c

c.Link(
    components=[c.Text(text='Open My App')],
    on_click=GoToEvent(url='myapp://some/parameters'),
)

I would expect this to result in the browser navigating to myapp://additional/data but it navigates to myfastuisite.com/somepage/myproto://additional/data

It's being interpreted as a relative path instead of a complete uri.

See here for info about uri schems / custom uri protocols:

• https://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml
• http://msdn.microsoft.com/en-us/library/aa767914(v=vs.85).aspx