Build the Page widget's uri from public url of the page. Fixes #19

Author: sylvainjule

index.php

@@ -73,12 +73,20 @@
         				$uris = [];
         				foreach(kirby()->languages() as $language) {
         					$code = $language->code();
-        					$uris[$code] = $this->model()->uri($code);
+                            // re-create the uri from the public url
+                            $currentUrl  = $this->model()->url($code); // get the page url
+                            $currentUri  = str_replace(site()->url(), '', $currentUrl); // substract the site url to get the uri
+                            $currentUri  = '/' . ltrim($currentUri, '/'); // make sure it starts by a single forward slash
+        					$uris[$code] = $currentUri;
         				}
         				return $uris;
         			}
         			else {
-        				return $this->model()->uri();
+        				// re-create the uri from the public url
+                        $currentUrl  = $this->model()->url(); // get the page url
+                        $currentUri  = str_replace(site()->url(), '', $currentUrl); // substract the site url to get the uri
+                        $currentUri  = '/' . ltrim($currentUri, '/'); // make sure it starts by a single forward slash
+                        return $currentUri;
         			}
         		},
         		'lang' => function() {