Improve performance of Manager.setAllModsEnabled

- Skip processing the mods that already are in the desired state
- Update VueX store only once at the end, not after each mod, since
  this will trigger a costly rerendering (which will be addressed
  separately

src/pages/Manager.vue

@@ -499,7 +499,13 @@ import CategoryFilterModal from '../components/modals/CategoryFilterModal.vue';
 		}
 
         async setAllModsEnabled(enabled: boolean) {
+            let lastSuccessfulUpdate: ManifestV2[] = [];
+
             for (const mod of this.localModList) {
+                if (mod.isEnabled() === enabled) {
+                    continue;
+                }
+
                 let profileErr: R2Error | void;
                 if (enabled) {
                     profileErr = await ProfileInstallerProvider.instance.enableMod(mod, this.contextProfile!);
@@ -520,9 +526,15 @@ import CategoryFilterModal from '../components/modals/CategoryFilterModal.vue';
                 if (update instanceof R2Error) {
                     this.showError(update);
                     continue;
+                } else {
+                    lastSuccessfulUpdate = update;
                 }
-                await this.$store.dispatch("updateModList", update);
             }
+
+            if (lastSuccessfulUpdate.length) {
+                await this.$store.dispatch("updateModList", lastSuccessfulUpdate);
+            }
+
             await this.$router.push({name: "manager.installed"});
         }