Dapps errors embeddable on signer (#3115)

dapps/src/router/mod.rs

@@ -117,6 +117,7 @@ impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
 					"404 Not Found",
 					"Requested content was not found.",
 					None,
+					self.signer_port,
 				))
 			},
 			// Redirect any other GET request to signer.
@@ -131,6 +132,7 @@ impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
 						"404 Not Found",
 						"Your homepage is not available when Trusted Signer is disabled.",
 						Some("You can still access dapps by writing a correct address, though. Re-enabled Signer to get your homepage back."),
+						self.signer_port,
 					))
 				}
 			},