Use Benchpress (#5901)

* Use Benchpress

* Use Benchpress.compileParse

* Error for template load failure

* Use benchpressjs package

* Compile templates on demand

* Fix user settings page

* Fix admin search to exclude `.jst` files

* Fix 500-embed

So ajaxify can still show an error if the server goes down

src/admin/search.js

@@ -14,10 +14,12 @@ function filterDirectories(directories) {
 		// get the relative path
 		return dir.replace(/^.*(admin.*?).tpl$/, '$1');
 	}).filter(function (dir) {
+		// exclude .jst files
 		// exclude partials
 		// only include subpaths
 		// exclude category.tpl, group.tpl, category-analytics.tpl
-		return !dir.includes('/partials/') &&
+		return !dir.endsWith('.jst') &&
+			!dir.includes('/partials/') &&
 			/\/.*\//.test(dir) &&
 			!/manage\/(category|group|category-analytics)$/.test(dir);
 	});