[navigation] Do not reset the base tag if, during loadPage we find th…

…at the page is already in the DOM, or that we have been prevented from continuing because the default for the "pagebeforeload" event has been prevented.

js/jquery.mobile.navigation.js

@@ -724,11 +724,6 @@ define( [
 			}
 		}
 
-		// Reset base to the default document base.
-		if ( base ) {
-			base.reset();
-		}
-
 		// If the page we are interested in is already in the DOM,
 		// and the caller did not indicate that we should force a
 		// reload of the file, we are done. Otherwise, track the
@@ -772,6 +767,11 @@ define( [
 				};
 		}
 
+		// Reset base to the default document base.
+		if ( base ) {
+			base.reset();
+		}
+
 		if ( !( $.mobile.allowCrossDomainPages || path.isSameDomain( documentUrl, absUrl ) ) ) {
 			deferred.reject( absUrl, options );
 		} else {