Re-use global app variable in ModLoader

The linkApp method is removed as it was unused. A getter is used to
ensure best development experience. It can be further improved by adding
a guard for cases where GLOBAL_APP is not set yet.

src/js/application.js

@@ -1,7 +1,7 @@
 import { AnimationFrame } from "./core/animation_frame";
 import { BackgroundResourcesLoader } from "./core/background_resources_loader";
 import { GameState } from "./core/game_state";
-import { GLOBAL_APP, setGlobalApp } from "./core/globals";
+import { setGlobalApp } from "./core/globals";
 import { InputDistributor } from "./core/input_distributor";
 import { Loader } from "./core/loader";
 import { createLogger } from "./core/logging";
@@ -41,10 +41,8 @@ export class Application {
     async boot() {
         console.log("Booting ...");
 
-        assert(!GLOBAL_APP, "Tried to construct application twice");
         logger.log("Creating application, platform =", getPlatformName());
         setGlobalApp(this);
-        MODS.app = this;
 
         // MODS
 

src/js/core/globals.js

@@ -12,7 +12,7 @@ export let GLOBAL_APP = null;
  * @param {Application} app
  */
 export function setGlobalApp(app) {
-    assert(!GLOBAL_APP, "Create application twice!");
+    assert(!GLOBAL_APP, "Tried to set GLOBAL_APP twice");
     GLOBAL_APP = app;
 }
 

src/js/mods/modloader.js

@@ -1,6 +1,3 @@
-/* typehints:start */
-import { Application } from "../application";
-/* typehints:end */
 import { FsError } from "@/platform/fs_error";
 import { globalConfig } from "../core/config";
 import { createLogger } from "../core/logging";
@@ -9,6 +6,7 @@ import { Mod } from "./mod";
 import { ModInterface } from "./mod_interface";
 import { MOD_SIGNALS } from "./mod_signals";
 
+import { GLOBAL_APP } from "@/core/globals";
 import semverSatisifies from "semver/functions/satisfies";
 import semverValidRange from "semver/ranges/valid";
 
@@ -32,11 +30,6 @@ export class ModLoader {
     constructor() {
         LOG.log("modloader created");
 
-        /**
-         * @type {Application}
-         */
-        this.app = undefined;
-
         /** @type {Mod[]} */
         this.mods = [];
 
@@ -50,8 +43,8 @@ export class ModLoader {
         this.signals = MOD_SIGNALS;
     }
 
-    linkApp(app) {
-        this.app = app;
+    get app() {
+        return GLOBAL_APP;
     }
 
     anyModsActive() {