contract/project_sla/project_issue_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>

        <!-- Project Issue Form -->
        <record id="project_issue_form_view_sla" model="ir.ui.view">
            <field name="name">project_issue_form_view_sla</field>
            <field name="model">project.issue</field>
            <field name="inherit_id" ref="project_issue.project_issue_form_view"/>
            <field name="arch" type="xml">

              <page string="Extra Info" position="after">
                <page name="sla_page" string="Service Levels"
                      attrs="{'invisible': [('sla_state', '=', False)]}">
                    <group>
                      <group>
                        <field name="sla_state" />
                      </group>
                      <group>
                        <field name="write_date" />
                      </group>
                    </group>
                    <field name="sla_control_ids"/>
                </page>
              </page>

           </field>
        </record>

        <!-- Project Issue List  -->
        <record model="ir.ui.view" id="project_issue_tree_view_sla">
            <field name="name">project_issue_tree_view_slak</field>
            <field name="model">project.issue</field>
            <field name="inherit_id" ref="project_issue.project_issue_tree_view"/>
            <field name="arch" type="xml">

                <field name="project_id" position="after">
                    <field name="sla_state"/>
                </field>

            </field>
        </record>


        <!-- Project Issue Filter -->
        <record id="view_project_issue_filter_sdesk" model="ir.ui.view">
            <field name="name">view_project_issue_filter_sdesk</field>
            <field name="model">project.issue</field>
            <field name="inherit_id" ref="project_issue.view_project_issue_filter"/>
            <field name="arch" type="xml">

                <filter string="Priority" position="after">
                    <filter string="SLA Status" context="{'group_by':'sla_state'}" />
                </filter>

           </field>
        </record>


<!--
        <record id="project_issue_kanban_view_sla" model="ir.ui.view">
            <field name="name">project_issue_kanban_view_sla</field>
            <field name="model">project.issue</field>
            <field name="inherit_id" ref="project_issue.project_issue_kanban_view" />
            <field name="arch" type="xml">

                <field name="kanban_state" position="after">
                    <field name="sla_state" />
                </field>
                <div class="oe_kanban_footer_left" position="inside">
                  <div class="oe_kanban_highlight" name="sla_icon_placeholder">
                    <span t-if="record.sla_state.raw_value === '3'"
                          class="oe_e oe_kanban_text_red">c</span>
                    <span t-if="record.sla_state.raw_value === '4'"
                          class="oe_e oe_kanban_text_red">[</span>
                    <span t-if="record.sla_state.raw_value === '1'"
                          class="oe_e oe_kanban_text_green">W</span>
                  </div>
                </div>

            </field>
        </record>
-->
    </data>
</openerp>