GUACAMOLE-598: Abort rendering of pages if critical data fails to load (data without which the page is non-functional).

guacamole/src/main/webapp/app/manage/controllers/manageConnectionController.js

@@ -287,7 +287,7 @@ angular.module('manage').controller('manageConnectionController', ['$scope', '$i
                     PermissionSet.hasConnectionPermission,
                     identifier);
 
-    }, requestService.WARN);
+    }, requestService.DIE);
     
     // Get history date format
     $translate('MANAGE_CONNECTION.FORMAT_HISTORY_START').then(function historyDateFormatReceived(historyDateFormat) {

guacamole/src/main/webapp/app/manage/controllers/manageConnectionGroupController.js

@@ -245,7 +245,7 @@ angular.module('manage').controller('manageConnectionGroupController', ['$scope'
                     PermissionSet.hasConnectionPermission,
                     identifier);
 
-    }, requestService.WARN);
+    }, requestService.DIE);
 
     /**
      * Cancels all pending edits, returning to the main list of connections

guacamole/src/main/webapp/app/manage/controllers/manageSharingProfileController.js

@@ -277,7 +277,7 @@ angular.module('manage').controller('manageSharingProfileController', ['$scope',
                     PermissionSet.hasConnectionPermission,
                     identifier);
 
-    }, requestService.WARN);
+    }, requestService.DIE);
 
     /**
      * @borrows Protocol.getNamespace

guacamole/src/main/webapp/app/manage/controllers/manageUserController.js

@@ -335,7 +335,7 @@ angular.module('manage').controller('manageUserController', ['$scope', '$injecto
 
         });
 
-    }, requestService.WARN);
+    }, requestService.DIE);
 
     /**
      * Returns the URL for the page which manages the user account currently