chore: LSDV-4983: Consistent feature flags (#1329)

* chore: LSDV-4983: Consistent feature flags

Enable Magic Wand in LSF (should've been done from the beginning)
Disable Image preloading (LSDV-4583-6) while CORS not fixed yet

* Change list to enable important/useful flags

Default state is false, so no need to disable all not ready yet flags.

* Simplify feature flags init code

* Update flags.json

Enable by default:
- New Labeling UI
- Fixes for Taxonomy performace

---------

Co-authored-by: hlomzik <hlomzik@users.noreply.github.com>

Author: hlomzik

src/core/feature-flags/flags.json

@@ -3,6 +3,9 @@
   "ff_front_DEV_1713_audio_ui_150222_short": false,
   "ff_front_dev_2715_audio_3_280722_short": true,
   "fflag_fix_front_dev_3391_interactive_view_all": false,
-  "fflag_feat_front_lsdv_4832_new_ranker_tag_120423_short": true,
-  "fflag_feat_front_dev_4081_magic_wand_tool": false
+  "fflag_fix_front_dev_3617_taxonomy_memory_leaks_fix": true,
+  "fflag_feat_front_dev_3873_labeling_ui_improvements_short": true,
+  "fflag_feat_front_dev_4081_magic_wand_tool": true,
+  "fflag_feat_front_lsdv_3012_syncable_tags_070423_short": true,
+  "fflag_feat_front_lsdv_4832_new_ranker_tag_120423_short": true
 }

src/core/feature-flags/index.ts

@@ -1,20 +1,11 @@
 if (process.env.NODE_ENV !== 'production' && !window.APP_SETTINGS) {
-  const APP_SETTINGS = window.APP_SETTINGS as Record<string, any> | undefined;
-
-  const flags = (() => {
+  const feature_flags = (() => {
     try {
       return require('./flags.json');
     } catch (err) {
       return {};
     }
   })();
 
-  Object.assign(window, {
-    APP_SETTINGS: {
-      feature_flags: {
-        ...(APP_SETTINGS?.feature_flags ?? {}),
-        ...flags,
-      },
-    },
-  });
+  window.APP_SETTINGS = { feature_flags };
 }