Fix link password toggle

We took the wrong field from the share api response. So the password was
never shown as set.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

core/js/shareitemmodel.js

@@ -802,7 +802,7 @@
 							isLinkShare: true,
 							id: share.id,
 							token: share.token,
-							password: share.password,
+							password: share.share_with,
 							link: link,
 							permissions: share.permissions,
 							// currently expiration is only effective for link shares.