Added two dummy reports to print an empty internal and external report
and added direct link to edit header/footers template in the form view
(in technical features) for convenience.
Also moved the 'preview rml report' under the rml configuration and
tried to make the company form as clean as possible but i think it's
failed.
In view inheritance, selecting an element based on the attribute `string` is
broken, since this attribute may be translated before the inheritance is
applied. This fixes existing views to avoid such selections.
Simon Lejeune