Use proper datetime data in update SQL
Add mediawiki package from the platform.
Fixed alignment of admin menu icons

Joomla 3.1 has introduced the menu icons in the admin top nav again (for components, etc).
However, when using the standard 16x16px sized icons, the alignment is off.
This fix corrects that issue.

#### Testing instructions
If you don't have a component with an icon, add an icon to a component by placing the url (relative to the admin folder) of the icon in the 'img' field of the #__menu table for that component.
Update template.css
Update template.css
Update template.less
removed icons completely from isis admin menu
removed icons completely from isis admin menu
Add OpenStreetMap package from platform
 # [#30361] Chosen minified and un-minified versions are different.
Thanks Roberto
 # [#30348] Popular Tags Module showing multiple copies of links. Thanks
Elin
 # [#30351] State and language filtering not presesnt in Similar Tag
module. Thanks Elin.
 # [#30234] Route work classes for Tags. Thanks Elin
Merge pull request #833 from elinw/mediawiki

Add mediawiki package from the platform.
[#30356] Update JImage to latest platform version.
[#30266] Array to string conversion in smart search
[#28978] Smart search (com_finder) - problem when using 'Allow Empty Search'
[#30338] Wrong contact items publishing state from Contact details > state
Merge pull request #881 from elinw/openstreetmap

Add OpenStreetMap package from platform
[#30364] Add UNION ALL feature from platform