Add user status filter to admin user management page (#16770)

It makes Admin's life easier to filter users by various status.

* introduce window.config.PageData to pass template data to javascript module and small refactor

move legacy window.ActivityTopAuthors to window.config.PageData.ActivityTopAuthors
make HTML structure more IDE-friendly in footer.tmpl and head.tmpl
remove incorrect <style class="list-search-style"></style> in head.tmpl
use log.Error instead of log.Critical in admin user search

* use LEFT JOIN instead of SubQuery when admin filters users by 2fa. revert non-en locale.

* use OptionalBool instead of status map

* refactor SearchUserOptions.toConds to SearchUserOptions.toSearchQueryBase

* add unit test for user search

* only allow admin to use filters to search users

templates/base/head.tmpl

@@ -26,6 +26,7 @@
 	<meta name="go-source" content="{{.GoGetImport}} _ {{.GoDocDirectory}} {{.GoDocFile}}">
 {{end}}
 	<script>
+		<!-- /* eslint-disable */ -->
 		window.config = {
 			AppVer: '{{AppVer}}',
 			AppSubUrl: '{{AppSubUrl}}',
@@ -33,6 +34,7 @@
 			CustomEmojis: {{CustomEmojis}},
 			UseServiceWorker: {{UseServiceWorker}},
 			csrf: '{{.CsrfToken}}',
+			PageData: {{ .PageData }},
 			HighlightJS: {{if .RequireHighlightJS}}true{{else}}false{{end}},
 			SimpleMDE: {{if .RequireSimpleMDE}}true{{else}}false{{end}},
 			Tribute: {{if .RequireTribute}}true{{else}}false{{end}},
@@ -75,7 +77,6 @@
 			.ui.secondary.menu .dropdown.item > .menu { margin-top: 0; }
 		</style>
 	</noscript>
-	<style class="list-search-style"></style>
 {{if .PageIsUserProfile}}
 	<meta property="og:title" content="{{.Owner.Name}}" />
 	<meta property="og:type" content="profile" />
@@ -134,8 +135,10 @@
 				{{template "base/head_navbar" .}}
 			</div><!-- end bar -->
 		{{end}}
-{{/*
+
+{{if false}}
+	{{/* to make html structure "likely" complete to prevent IDE warnings */}}
 	</div>
 </body>
 </html>
-*/}}
+{{end}}