Feature/about screen add option to check for and trigger updates (#485)

* [VersionMapping] Require server version "r1436" for preview

* Move ts util types to new type file

* Add buttons for updating server and webUI

src/lib/requests/client/GraphQLClient.ts

@@ -19,7 +19,9 @@ const typePolicies: StrictTypedTypePolicies = {
     GlobalMetaType: { keyFields: ['key'] },
     ExtensionType: { keyFields: ['apkName'] },
     AboutServerPayload: { keyFields: [] },
+    AboutWebUI: { keyFields: [] },
     WebUIUpdateInfo: { keyFields: [] },
+    WebUIUpdateCheck: { keyFields: [] },
     SettingsType: { keyFields: [] },
     Query: {
         fields: {