Switch Request to use readonly properties

We're using Get methods in Request. It works just fine, but if we switch
to properties we can simplify the syntax a bit when using it.

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>
Make list of shared files display FilePath

In an earlier commit we changed the Path property in File to FilePath.
What we did not do was update the UI binding to reflect this, which meant
that shared files where not displayed in the UI correctly.

Fix the problem by updating the UI binding to use FilePath.

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>