Merge branch 'main' into 5.0

# Conflicts:
#	migrations/44-50/new-deprecations.md

Author: HLeithner

docs/common-errors/index.md

@@ -8,12 +8,12 @@ Some frequently asked questions on Error messages and how to resolve them.
 
 As a developer you somtimes will be stuck in your code. 
 If it happens to you, also have a look on https://joomla.stackexchange.com/ - a huge collection of valuable knowledge. 
-Here we collect some frequently aske questions. 
+Here we collect some frequently asked questions. 
 
 Class [..] not found
 --------------------
 
-You need to understand the namespace concept as described in sction General Concepts (work in progress)
+You need to understand the namespace concept as described in section General Concepts (work in progress)
 Then check:
 - Is the namespace defined in your manifest file? 
 - Has every class in your extension the correct namespace?

migrations/44-50/new-deprecations.md

@@ -6,10 +6,27 @@ New deprecations
 ================
 All the new deprecations that should be aware of and what you should now be using instead.
 
+:::caution TODO
+
+This page is unfinished, please use the **Edit this Page** link at the bottom of this page to help make it more useful.
+
+:::
+
+
 # Language strings
 
 File: administrator/language/en-GB/com_joomlaupdate.ini  
 Strings: INSTL_MB_STRING_OVERLOAD_OFF, INSTL_NOTICEMBSTRINGOVERLOAD
 
 File: installation/language/en-GB/joomla.ini  
 Strings: INSTL_MB_STRING_OVERLOAD_OFF, INSTL_NOTICE_MBSTRING_OVERLOAD_OFF
+
+#### The item_associations property of the WebApplication class is deprecated
+
+File: libraries/src/Application/WebApplication.php
+Replacement: The $item_associations property will be removed with no replacement as it is not used in core anymore.
+
+#### Privacy plugin app property is deprecated
+
+File: administrator/components/com_privacy/src/Plugin/PrivacyPlugin.php
+Replacement: The `$this->app` property is deprecated in the privacy plugins. Instead of use `$this->getApplication()` when the plugin is converted to service providers.