do not reset password and other settings on provider change

src/views/backups.js

@@ -250,7 +250,7 @@ angular.module('Application').controller('BackupsController', ['$scope', '$locat
         format: 'tgz',
         password: '',
 
-        clearForm: function () {
+        clearProviderFields: function () {
             $scope.configureBackup.bucket = '';
             $scope.configureBackup.prefix = '';
             $scope.configureBackup.accessKeyId = '';
@@ -260,13 +260,9 @@ angular.module('Application').controller('BackupsController', ['$scope', '$locat
             $scope.configureBackup.endpoint = '';
             $scope.configureBackup.region = '';
             $scope.configureBackup.backupFolder = '';
-            $scope.configureBackup.retentionSecs = 7 * 24 * 60 * 60;
-            $scope.configureBackup.intervalSecs = 24 * 60 * 60;
-            $scope.configureBackup.format = 'tgz';
             $scope.configureBackup.acceptSelfSignedCerts = false;
             $scope.configureBackup.useHardlinks = true;
             $scope.configureBackup.externalDisk = false;
-            $scope.configureBackup.password = '';
         },
 
         show: function () {