[IMP] qweb debug mode restricted to --dev mode

Also moved the set_trace call in top of render_node() function so it
makes more sense.
[IMP] Make translation todo's readable when hovered
[IMP] stock: allow float precision for quantity qty multiple

e.g. if orders with packages of 1/2 quantity
[IMP]sale_crm: Add new button (“Sales“) on Opportunity form view and display total amount of related quotes on that stat button.

[IMP]sale_crm: add new crm_lead.py file and add function fields to calculate total amount of related sale_order.