Fixes #630, #662, #677, #682, #684, #685

Fixes #630 - Vtiger 7 Mass edit "none of the fields have changed" validation incorrect

Fixes #662 - vt7: RelatedList.tpl many unnecessary calls to RELATED_MODULE->getName()

Fixes #677 - Spelling mistake in EmailTemplates/views/Popup.php

Fixes #682 - purchase order and margin input fields sequence number is not updated when new rows are added

Fixes #684 - Dashboard Tag Cloud - Only shows Tag's that are created by the User

Fixes #685 - vTiger 7.0 bug - Discount Fields disappear from Quote Module

Inventory hidden fields are not displaying (image, purchase cost, margin)

New function added to update the entries in vtiger_link

Unable to open menu in Module manager