Syncthing polish and fixes (#510)

* no message

* add test for discovery port/service

* add discovery service and port to questions.yaml

* fix questions.yaml not enabling ports on Syncthing

* Increase syncthing version number

* fix serviceports not being enabled on all other apps too.

* fix a small unrelated UI glitch/bug related to hostPathMounts

* bump patch versions for other apps

* adapt docs accordingly

* fix nzbget httpGet probe (or at least try to)

docs/development/app development/storage.md

@@ -147,18 +147,16 @@ It should always be included in any App, to give users the option to customise t
                         type: boolean
                         default: false
                         hidden: false
-                        show_subquestions_if: true
-                        subquestions:
-                          - variable: medium
-                            label: "EmptyDir Medium"
-                            schema:
-                              type: string
-                              default: ""
-                              enum:
-                                - value: ""
-                                  description: "Default"
-                                - value: "Memory"
-                                  description: "Memory"
+                    - variable: medium
+                      label: "EmptyDir Medium"
+                      schema:
+                        type: string
+                        default: ""
+                        enum:
+                          - value: ""
+                            description: "Default"
+                          - value: "Memory"
+                            description: "Memory"
               - variable: mountPath
                 label: "Mount Path"
                 description: "Path to mount inside the pod"