select all button

app/assets/stylesheets/application.scss.erb

@@ -2311,6 +2311,9 @@ and it won't be important on password protected instances */
 }
 /* switch metacode set */
 
+#switchMetacodes > p {
+    margin: 16px 0 16px 0;
+}
 #metacodeSwitchTabs {
     width: 100%;
     font-size: 17px;
@@ -2318,28 +2321,36 @@ and it won't be important on password protected instances */
     border: none;
     background: none;
     padding: 0;
-}
-#metacodeSwitchTabs .setDesc {
-    margin-bottom: 5px;
-    font-family: 'din-medium', helvetica, sans-serif;
-    color: #424242;
-    font-size: 14px;
-    text-align: justify;
-    padding-right: 16px;
-}
-#switchMetacodes > p {
-    margin: 16px 0 16px 0;
-}
-#metacodeSwitchTabs > ul {
-    width: 130px;
-}
-#metacodeSwitchTabs > ul li {
-    font-size: 14px;
-    text-transform: uppercase;
-}
-#metacodeSwitchTabs li.ui-state-active a {
-    color: #00BCD4;
-    cursor: pointer;
+
+    .setDesc,
+    .selectAll {
+        margin-bottom: 5px;
+        font-family: 'din-medium', helvetica, sans-serif;
+        color: #424242;
+        font-size: 14px;
+        text-align: justify;
+        padding-right: 16px;
+        display: inline-block;
+    }
+
+    .selectAll {
+      float: right;
+      cursor: pointer;
+    }
+
+    & > ul {
+        width: 130px;
+
+        li {
+            font-size: 14px;
+            text-transform: uppercase;
+        }
+    }
+
+    li.ui-state-active a {
+        color: #00BCD4;
+        cursor: pointer;
+    }
 }
 .metacodeSwitchTab {
     max-height: 300px;

app/views/shared/_switchmetacodes.html.erb

@@ -91,7 +91,8 @@
   </div>
   <% end %>
     <div id="metacodeSwitchTabsCustom">
-        <p class="setDesc">Choose Your Metacodes</p>
+        <div class="setDesc">Choose Your Metacodes</div>
+        <div class="selectAll">Select all</div> <%# hidden by default %>
         <% @list = '' %>
         <% metacodesInUse = user_metacodes() %> 
         <% Metacode.order("name").all.each_with_index do |m, index| %>

frontend/src/Metamaps/Create.js

@@ -28,6 +28,7 @@ const Create = {
     }).addClass('ui-tabs-vertical ui-helper-clearfix')
     $('#metacodeSwitchTabs .ui-tabs-nav li').removeClass('ui-corner-top').addClass('ui-corner-left')
     $('.customMetacodeList li').click(self.toggleMetacodeSelected) // within the custom metacode set tab
+    $('.selectAll').click(self.metacodeSelectorToggleSelectAll)
   },
   toggleMetacodeSelected: function() {
     var self = Create