Enable new global search by default

The new global search would now be activated by default and users,
 have the option to revert to the old unified search by setting `unified_search.enabled`
to true in the NC `config.php` file.

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>

lib/private/TemplateLayout.php

@@ -108,11 +108,8 @@ public function __construct($renderAs, $appId = '') {
 
 			$this->initialState->provideInitialState('core', 'active-app', $this->navigationManager->getActiveEntry());
 			$this->initialState->provideInitialState('core', 'apps', $this->navigationManager->getAll());
-			/*
-			 * NB : Unified search enabled, defaults to true since new advanced search is
-			 * unstable. Once we think otherwise, the default should be false.
-			 */
-			if ($this->config->getSystemValueBool('unified_search.enabled', true)) {
+
+			if ($this->config->getSystemValueBool('unified_search.enabled', false)) {
 				$this->initialState->provideInitialState('unified-search', 'limit-default', (int)$this->config->getAppValue('core', 'unified-search.limit-default', (string)SearchQuery::LIMIT_DEFAULT));
 				$this->initialState->provideInitialState('unified-search', 'min-search-length', (int)$this->config->getAppValue('core', 'unified-search.min-search-length', (string)1));
 				$this->initialState->provideInitialState('unified-search', 'live-search', $this->config->getAppValue('core', 'unified-search.live-search', 'yes') === 'yes');