[IMP] *_sale, sale, sale_*: improvements in form view

Sending a quotation by mail is really rare and the option is still
available in dropdown menu. It is also confusing to see the document status
changed while you just want to print as a draft sometimes. So the PRINT button
is removed here.

Only displayed UNLOCK/LOCK for 'sales managers' if the
option “Lock confirmed orders” is activated in the settings.

Removed the ability to open the payment terms via external button
in edit mode

Removed the left,right and top borders in the field of terms and condition.
Kept only bottom border.

Event and Event ticket will come after Product regardless of it being a
template or the product.

In the sale order's form view, made certain changes like shifting
the positions, removing the field, adding title, keeping the field
in debug mode.

task-2033229