[fix] error display compact chatter

static/src/xml/mail_widget.xml

@@ -14,6 +14,7 @@
     >
         <xpath expr="//div[hasclass('o_Composer_actionButtons')]" position="before">
             <!-- New boolean button in composer -->
+            <t t-if="!props.isCompact">
                 <div class="o_Composer_Restriction" style="margin-top: 10px;">
                     <input
                         type="checkbox"
@@ -24,6 +25,7 @@
                         for="oe_restricted_message"
                     > Restreindre le message à mon UR</label>
                 </div>
+            </t>
         </xpath>
     </t>