add alert for not-in-household and actions in page

accompanyingCourse/summary

* alert for people not in household for each accompanying course;
* style for action in alert
* form to members editor

src/Bundle/ChillMainBundle/Resources/public/scss/_alert-first-child.scss

@@ -0,0 +1,10 @@
+/* 
+ * when an alert is the first child of the page, with a banner, we do not want the alert to be merged with the banner
+ */
+div.container.content {
+  & > div {
+    div.alert:nth-child(2) {
+      margin-top: 1rem;
+    }
+  }
+}

src/Bundle/ChillMainBundle/Resources/public/scss/_alert-with-actions.scss

@@ -0,0 +1,29 @@
+
+div.alert.alert-with-actions {
+  display: flex;
+  flex-direction: row;
+
+  ul.record_actions {
+    display: flex;
+    flex-direction: column;
+    padding: 0;
+    margin: 0;
+
+    li:nth-child(1n+2) {
+      margin-top: 0.5rem; 
+    }
+
+    li {
+      margin-right: 0;
+    }
+  }
+
+  @media screen and (max-width: 1050px) {
+      flex-direction: column;
+
+      ul.record_actions {
+        margin-top: 1rem;
+        text-align: center;
+      }
+  }
+}

src/Bundle/ChillMainBundle/Resources/public/scss/chillmain.scss

@@ -7,6 +7,10 @@
 */
 
 
+@import 'alert-first-child';
+@import 'alert-with-actions';
+
+
 /*  [hack]  /!\ Contourne le positionnement problématique du div#content_conainter suivant,
  *  car sa position: relative le place au-dessus du bandeau et les liens sont incliquables  */
 div.subheader {