Fixes Issue #12421 - Change page title based on the site section being viewed (#12627)

* Update title for tabs not including challenges, guild and team

* add section titles to challenges, guilds, and groups

* Update dynamic title to use vuex action

* Remove duplicate key

* Actually remove duplicate key

* Fix section sub section in group

* Add note to implement setTitle when adding a page

* Add missing sections to dynamic title

* Features string not translated

* Use onGroupUpdate to update group titles

* Add watcher to challenges for dynamic title updates

* Small fixes

* Add register and login to title, remove duplicate keys

* Add home page dynamic title functionality

* Minor name changes

* remove wrong i18n strings from front.js

* refactor router note

Co-authored-by: Matteo Pagliazzi <matteopagliazzi@gmail.com>

website/client/src/pages/private-messages.vue

@@ -781,6 +781,9 @@ export default {
     },
   },
   async mounted () {
+    this.$store.dispatch('common:setTitle', {
+      section: this.$t('messages'),
+    });
     // notification click to refresh
     this.$root.$on(EVENTS.PM_REFRESH, async () => {
       await this.reload();