Updated incorrect language vars names.

Updated pagination urls.

#1776
Update opencart.sql

Correct finnish zone names
Improved checks for loaded DB php extensions and added cleared output to step 2 if none are found.
Fixed alternate db prefix during install issue.
Change to install/model/install.php to use create if not exist.
Applied DB prefix fix to upgrade script.
Updated to b04 release.
Removed unused language strings.
added a fake name for the 1st user
https://github.com/opencart/opencart/issues/1865
https://github.com/opencart/opencart/issues/1877
updated the text for panels
icons updated
more icon changes
https://github.com/opencart/opencart/issues/1865
https://github.com/opencart/opencart/issues/1865
https://github.com/opencart/opencart/issues/1881
Fixed button lang var
Fix for: https://opencart.atlassian.net/browse/OC-1878
Typo fix.