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/graphql/Fragments.ts

@@ -412,6 +412,21 @@ export const FULL_UPDATER_STATUS = gql`
     }
 `;
 
+export const ABOUT_WEBUI = gql`
+    fragment ABOUT_WEBUI on AboutWebUI {
+        channel
+        tag
+    }
+`;
+
+export const WEBUI_UPDATE_CHECK = gql`
+    fragment WEBUI_UPDATE_CHECK on WebUIUpdateCheck {
+        channel
+        tag
+        updateAvailable
+    }
+`;
+
 export const WEBUI_UPDATE_INFO = gql`
     fragment WEBUI_UPDATE_INFO on WebUIUpdateInfo {
         channel