fix null apiclient and add plugin config in admin

src/backend/UpdateManger.ts

@@ -4,6 +4,7 @@ import { GitUpdater, RepoFolderStatus } from "./GitUpdater";
 import { FrontblockCherryPicker } from "git-cherrypicker";
 import * as Logger from 'log4js'
 import { mkdirSync } from "fs";
+import { FrontblockAdmin } from "./FrontblockAdmin";
 var exec = require('child-process-promise').exec;
 
 Logger.configure({
@@ -20,13 +21,17 @@ Logger.configure({
 const logger = Logger.getLogger("admin/updatemanager") 
 
 
-export class UpdateManager implements Plugin{
+export class UpdateManager extends Plugin<void>{
     name: string = "UpdateManager"
-    private loadedPlugins:{[name in string]:Plugin} = {}
+    private loadedPlugins:{[name in string]:Plugin<any>} = {}
     private dashboardUpdater:GitUpdater
     private adminUpdater:GitUpdater
     private pluginUpdaters:{[name in string]:GitUpdater} = {}
 
+    constructor(admin:FrontblockAdmin){
+        super(admin, "UpdateManager")
+    }
+
     getDefaultConfig(): void {
         return
     }
@@ -163,21 +168,11 @@ export class UpdateManager implements Plugin{
         return await this.pluginUpdaters[pluginName].checkoutTag(tag)
     }
 
-    getLoadedPlugins():Plugin[]{
+    getLoadedPlugins():Plugin<any>[]{
         return Object.values(this.loadedPlugins)
     }
 
     getLoadedPluginNames():string[]{
         return Object.keys(this.loadedPlugins)
     }
-
-    start(): void | Promise<void> {
-        throw new Error("Method not implemented (on purpose)");
-    }
-
-    stop(): void | Promise<void> {
-        throw new Error("Method not implemented (on purpose)");
-    }
-
-
 }