[FIX] crm: opportunities list view
[FIX] crm: opportunities list view

When the lead step is activated (`group_use_lead` is true), 2 dinstinct
tree views can be selected to display the opportunities.

Indeed, when the action "Your Pipeline" is selected, the tree view
`crm_case_tree_view_oppor` is displayed thanks to the method
`action_your_pipeline`. However, when the page is reloaded or the tree
view is saved in the custom dashboard, the tree view
`crm_case_tree_view_leads` is selected instead.

The fix is to specify explicitly in the action which view should be
chosen, accordingly to what is done in method `action_your_pipeline`.

opw-681488
opw-681734

hip-odoo/odoo,storm-computers/odoo,dfang/odoo,dfang/odoo,Elico-Corp/odoo_OCB,dfang/odoo,laslabs/odoo,hip-odoo/odoo,microcom/odoo,Elico-Corp/odoo_OCB,microcom/odoo,Elico-Corp/odoo_OCB,dfang/odoo,hip-odoo/odoo,ygol/odoo,bplancher/odoo,hip-odoo/odoo,laslabs/odoo,ygol/odoo,hip-odoo/odoo,bplancher/odoo,microcom/odoo,ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,dfang/odoo,dfang/odoo,storm-computers/odoo,microcom/odoo,hip-odoo/odoo,microcom/odoo,storm-computers/odoo,laslabs/odoo,laslabs/odoo,bplancher/odoo,laslabs/odoo,storm-computers/odoo,ygol/odoo,bplancher/odoo,ygol/odoo,bplancher/odoo,ygol/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,storm-computers/odoo,laslabs/odoo,microcom/odoo,Elico-Corp/odoo_OCB