huge upgrade to theme and pagefind search bar.

themes/hugo-book.backup/exampleSite/content.en/docs/example/collapsed/3rd-level/4th-level.md

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+# 4th Level of Menu
+
+## Caesorum illa tu sentit micat vestes papyriferi
+
+Inde aderam facti; Theseus vis de tauri illa peream. Oculos **uberaque** non
+regisque vobis cursuque, opus venit quam vulnera. Et maiora necemque, lege modo;
+gestanda nitidi, vero? Dum ne pectoraque testantur.
+
+Venasque repulsa Samos qui, exspectatum eram animosque hinc, [aut
+manes](http://www.creveratnon.net/apricaaetheriis), Assyrii. Cupiens auctoribus
+pariter rubet, profana magni super nocens. Vos ius sibilat inpar turba visae
+iusto! Sedes ante dum superest **extrema**.

themes/hugo-book.backup/exampleSite/content.en/docs/example/collapsed/3rd-level/_index.md

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+# 3rd Level of Menu
+
+Nefas discordemque domino montes numen tum humili nexilibusque exit, Iove. Quae
+miror esse, scelerisque Melaneus viribus. Miseri laurus. Hoc est proposita me
+ante aliquid, aura inponere candidioribus quidque accendit bella, sumpta.
+Intravit quam erat figentem hunc, motus de fontes parvo tempestate.
+
+    iscsi_virus = pitch(json_in_on(eupViral),
+            northbridge_services_troubleshooting, personal(
+            firmware_rw.trash_rw_crm.device(interactive_gopher_personal,
+            software, -1), megabit, ergonomicsSoftware(cmyk_usb_panel,
+            mips_whitelist_duplex, cpa)));
+    if (5) {
+        managementNetwork += dma - boolean;
+        kilohertz_token = 2;
+        honeypot_affiliate_ergonomics = fiber;
+    }
+    mouseNorthbridge = byte(nybble_xmp_modem.horse_subnet(
+            analogThroughputService * graphicPoint, drop(daw_bit, dnsIntranet),
+            gateway_ospf), repository.domain_key.mouse(serverData(fileNetwork,
+            trim_duplex_file), cellTapeDirect, token_tooltip_mashup(
+            ripcordingMashup)));
+    module_it = honeypot_driver(client_cold_dvr(593902, ripping_frequency) +
+            coreLog.joystick(componentUdpLink), windows_expansion_touchscreen);
+    bashGigabit.external.reality(2, server_hardware_codec.flops.ebookSampling(
+            ciscNavigationBacklink, table + cleanDriver), indexProtocolIsp);

themes/hugo-book.backup/exampleSite/content.en/docs/example/collapsed/_index.md

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+---
+bookCollapseSection: true
+weight: 20
+---