[Code Style] Backend com_templates fix. Closes #4631
[CS] com_finder frontend and com_newsfeed backend. Closes #4622. Closes #4619
[Code Style] com_media backend. Closes #4621
[Code Style] Changes in tag standards: Libraries/legacy. Closes #4625
[Code Style] Changes in tag standards: Libraries/cms. Closes #4603
[Code Style] Changes in tag standards: Libraries/joomla. Closes #4617
[Code Style] Changes in tag standards: Admin Modules and mix. Closes #4632. Closes #4643
Merge branch 'staging' into 3.4-dev

Conflicts:
	administrator/components/com_newsfeeds/tables/newsfeed.php
	libraries/joomla/database/driver/mysql.php
	libraries/joomla/database/exporter/mysql.php
	libraries/joomla/database/importer/mysql.php
	libraries/joomla/database/iterator/mysql.php
	libraries/joomla/database/query/mysql.php
	libraries/joomla/facebook/oauth.php
	libraries/joomla/facebook/object.php
	libraries/joomla/google/data/plus.php
	libraries/joomla/google/data/plus/activities.php
	libraries/joomla/google/data/plus/comments.php
	libraries/joomla/google/data/plus/people.php
	libraries/joomla/linkedin/oauth.php
	libraries/joomla/string/string.php
	libraries/joomla/table/table.php
	libraries/joomla/twitter/oauth.php
	libraries/joomla/utilities/arrayhelper.php
	libraries/vendor/joomla/compat/src/JsonSerializable.php
	libraries/vendor/joomla/string/src/Inflector.php
	libraries/vendor/joomla/string/src/Normalise.php