I extended \"hr.employee\" class. (Inherited and gave the same name to the new one). I defined two views (tree and form) and a menu:
You have to map your action with particular tree,form
view.
Try this:
<record model="ir.actions.act_window" id="action_my_hr_employee_seq">
<field name="name">Angajati</field>
<field name="res_model">hr.employee</field>
<field name="view_type">form</field>
<field name="view_mode">tree,form</field>
</record>
<record model="ir.actions.act_window.view" id="act_hr_employee_tree_view">
<field eval="1" name="sequence"/>
<field name="view_mode">tree</field>
<field name="view_id" ref="your_tree_view_id"/>
<field name="act_window_id" ref="action_my_hr_employee_seq"/>
</record>
<record model="ir.actions.act_window.view" id="act_hr_employee_form_view">
<field eval="2" name="sequence"/>
<field name="view_mode">form</field>
<field name="view_id" ref="your_form_view_id"/>
<field name="act_window_id" ref="action_my_hr_employee_seq"/>
</record>