Fix restore search error in RestoreController (#4998)

* Fix restore search error in RestoreController.

TypeError: Cannot read Property 'Path' of undefined.
Add a break to for loop, thanks @tx0h (#4997).

* Remove empty '\' entries from restore picker.

The paths are split by dirsep, but directories end with it, which results in an empty part at the end.

Duplicati/Server/webroot/ngax/scripts/controllers/RestoreController.js

@@ -246,6 +246,10 @@ backupApp.controller('RestoreController', function ($rootScope, $scope, $routePa
                         if (cp.indexOf(compareablePath(sn.Path)) == 0) {
                             var curpath = sn.Path;
                             var parts = p.substr(sn.Path.length).split(dirsep);
+                            // Remove empty part if path had dirsep at end
+                            if (parts[parts.length - 1].length == 0) {
+                                parts.pop();
+                            }
                             var col = sn;
 
                             for(var k in parts) {
@@ -261,6 +265,7 @@ backupApp.controller('RestoreController', function ($rootScope, $scope, $routePa
                                     if (compareablePath(col.Children[m].Path) == compareablePath(curpath)) {
                                         found = true;
                                         col = col.Children[m];
+                                        break;
                                     }
                                 }