Relocate dashboard code. The dashboard widget alias must look like 'omv.widget.dashboard.xxx' now.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1203 3c3d7b80-5828-415e-9f61-280b98178fff
Mantis 0001045: User defined cron mailer may send empty emails.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1204 3c3d7b80-5828-415e-9f61-280b98178fff
Mantis 0001046: English translation typo.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1205 3c3d7b80-5828-415e-9f61-280b98178fff