feature/api-controller-improvements (#567)

* added error handler for api controller
* while downloading the config from the api, the Connecting status is now displayed
* added a button to delete container config for api servers
* added crc check to avoid re-import of api configs
* fixed currentIndex of serversMenuContent after DefaultServerIndexChanged
* added closing the import window after re-importing the config from api

client/ui/qml/Pages2/PageStart.qml

@@ -111,6 +111,22 @@ PageType {
             PageController.showNotificationMessage(message)
             PageController.closePage()
         }
+
+        function onNoInstalledContainers() {
+            PageController.setTriggeredBtConnectButton(true)
+
+            ServersModel.currentlyProcessedIndex = ServersModel.getDefaultServerIndex()
+            InstallController.setShouldCreateServer(false)
+            PageController.goToPage(PageEnum.PageSetupWizardEasy)
+        }
+    }
+
+    Connections {
+        target: ApiController
+
+        function onErrorOccurred(errorMessage) {
+            PageController.showErrorMessage(errorMessage)
+        }
     }
 
     StackViewType {