I am trying to extend a formview to fullscreen, but everything i try, just doesn't work. Here is the view, and the last thing i've tried, to make it work. I've also tried to put in inside the action, but i don't get the result i want.

I've looked up in the css and i've found out that it sets the property modal-lg and a fixed with of 980px. If i put it to 100% it works as i want, but it works on other views, which i don't want.

Here is the code for the view:

        <record id="tabla_faq_area_instructions_form_view" model="ir.ui.view">
            <field name="name">Področje</field>
            <field name="model">tabla.faq.area</field>
<!--            <field name="target">fullscreen</field>-->
            <field name="arch" type="xml">
                <form>
                    <sheet>
                        <group colspan="4">
                            <field name="name" required="1"/>
                            <field name="blog_id" required="1" domain="[('is_category','=',True)]"/>
                        </group>
                        <group colspan="4">
                            <field name="instructions_ids" nolabel="1">
                                <tree>
                                    <field name="sequence" widget="handle"/>
                                    <field name="name"/>
                                    <field name="display_help"/>
                                    <field name="instructions"/>
                                </tree>
                            </field>
                        </group>
                    </sheet>
                </form>
            </field>
        </record>