[IMP] Reportings Review

This commit fixes lots of usability problems in the reporting views.
eg: new fields in the report, labelling inconsistencies, broken/outdated/used filters and group bys...

Detailed changelist
-------------------

account/Invoice Analysis:
- "Product Category" vs "Category of Product": labelling consistency
- group by Analytic Account

account_voucher/Sales Receipt Analysis:
- remove filter on Pro-forma

crm/Lead & Opportunities Analysis:
- "Exp." vs "Expected": labelluing consistency

crm/Phone Calls Analysis:
- remove Todo and My Phone Call filters
- fix My Sales Team(s) filter

crm_claim/Claims Analysis
- remove My Case(s) filter
- fix My Company(s) filter
- remove group by Sales Team
- fix label Creation Month

crm_helpdesk/Helpdesk Analysis
- remove My Case(s) filter

event/Events Analysis
- remove My Events & Show Confirmed Registrations filters
- fix labelling of Attendee / Contact group by

hr_holidays/Leaves Analysis
- remove My Requests filter

hr_recruitment/Recruitment Analysis
- remove My filter

marketing_campaign/Campaign Analysis
- fix labelling

mrp_operations/Work Order Analysis
- add fields Product Template, Product Category, Responsible, Routing
  and BoM
- fix labelling group by Planned Month

point_of_sale/Orders Analysis
- add fields Product Template, Invoiced, Point of Sale, Public Category,
  Warehouse and Pricelist
- fix Year filter

project/Tasks Analysis:
- remove My Task filter

project/Issues Analysis:
- remove My Issues filter
- remove Task group by

purchase/Purchase Analysis:
- fix quantity field into float
- add fields Product Template, Product Category, Partner Country, Fiscal
  Position, Analytic Account and Commercial Entity
- add group by Partner Country and Fiscal Position
- fix labelling "Product Category" vs "Category of product"

sale/Sales Analysis
- fix labelling "Product Category" vs "Category of product"
- add fields Product Template, Paid, # of Paid Lines, Partner Countru
  and Commercial Entity
- remove filter My Sales
- add group by Partner Country

sale_stock/Sales Analysis
- fix label name of shipped_qty_1

(congratulations if you read this boring commit message)

Code and analysis courtesy of yti@odoo.com & sve@odoo.com & qdc@odoo.com