[Glitch] Resolve typescript eslint warning

Port c578a0cb74 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/polyfills/index.ts

@@ -19,7 +19,7 @@ export function loadPolyfills() {
   return Promise.all([
     loadIntlPolyfills(),
     // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- those properties might not exist in old browsers, even if they are always here in types
-    needsExtraPolyfills && importExtraPolyfills(),
+    needsExtraPolyfills ? importExtraPolyfills() : Promise.resolve(),
     loadEmojiPolyfills(),
   ]);
 }

app/javascript/flavours/glitch/reducers/modal.ts

@@ -41,7 +41,7 @@ const popModal = (
     modalType === state.get('stack').get(0)?.get('modalType')
   ) {
     return state
-      .set('ignoreFocus', !!ignoreFocus)
+      .set('ignoreFocus', ignoreFocus)
       .update('stack', (stack) => stack.shift());
   } else {
     return state;