Added icon support for JHtmlSidebar::addEntry
Added isset check
Merge branch 'staging' of https://github.com/joomla/joomla-cms into staging
Use article_index_text as heading
Merge branch 'staging' of https://github.com/joomla/joomla-cms into staging
[fix] Inconsistency on list view output when 'no results' are available at backend
[fix] Inconsistency on list view output when 'no results' are available at backend com_installer, com_modules, com_plugins, com_templates
Merge branch 'staging' of github.com:joomla/joomla-cms into listviews
Don't polute the page with javascript
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Don't polute the page with javascript
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Merge branch 'Remove_jsscriptcode_isis' of https://github.com/dgt41/joomla-cms into Remove_jsscriptcode_isis

Conflicts:
	administrator/templates/isis/index.php
Fix languages sorting issue
Postgres: Install of an additional language fails

I installed the current staging branch using postgresql successfully. Afterwards I tried to install an additional language in the backend but it failed with the following message:

0 Database query failed (error # %s): %s SQL=SELECT "update_id" FROM "aehqu_updates" WHERE element = 'de-DE' AND type = 'language' AND client_id = '' AND folder = '' 

After applying this patch the installation went fine. I borrowed the idea from #1695.
Don't polute the page with javascript
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Don't polute the page with javascript
Merge branch 'Remove_jsscriptcode_isis' of https://github.com/dgt41/joomla-cms into Remove_jsscriptcode_isis
Merge pull request #4917 from joomdonation/patch-3

Fix Sorting Joomla! available languages issue