V-156500377::Amit::Reports Permission check in selected_fields

See merge request vtiger/vtigercrm!897

fixes issue #1777

Closes #1777

See merge request vtiger/vtigercrm!898

fix for issue #1579

See merge request vtiger/vtigercrm!899

#1579 fix bug that prevented adding the *Organization Name* (reference to account) when creating a ticket from a workflow

#1777 fixes bug that copied empty field contents for non-reference fields when target and source module are the same.

#1777 fixes bug that generated empty reference fields for records created via workflow when target and source module are the same