CMS - error check (#5796)

* cms connections dont save

* added value to enum

* remove refresh and update provider name for cms

* removed ownerUri from saved connection and contributed to array

* removed owneruri

* ownerUri not needed any more

* removed AAD from cms

* initial review

* changed comments

* add back saveProfile option for connectionProfile

* review fixes and other UI improvements

* fixed auth

* added cms integration tests

* added constants

* removed utils from apiwrapper

* changed connection type name

* review comments

* clearer code and addressed reviews

* added more error checks

* add back functions in apiwrapper

extensions/cms/src/cmsResource/tree/cmsResourceTreeNode.ts

@@ -75,8 +75,11 @@ export class CmsResourceTreeNode extends CmsResourceTreeNodeBase {
 					} else {
 						return [CmsResourceMessageTreeNode.create(CmsResourceTreeNode.noResourcesLabel, undefined)];
 					}
-
 				}
+			}, (error) => {
+				let errorText = localize('cms.errors.expandCmsFail', 'The Central Management Server {0} could not be found or is offline', this.name);
+				this.appContext.apiWrapper.showErrorMessage(errorText);
+				return [];
 			});
 		} catch {
 			return [];