Revert "[BACKLOG-26] Temporary disable create datasource for home screen...

.... There is old bug with scrolling. See http://jira.pentaho.com/browse/BACKLOG-26?focusedCommentId=193810&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-193810 for details"

This reverts commit 6036dbd08e33beb6c953e74589ec43373261819d.