comment only working, naive implementation complete

client/components/boards/boardHeader.jade

@@ -65,7 +65,7 @@ template(name="boardHeaderBar")
               if $eq watchLevel "muted"
                 i.fa.fa-bell-slash
               span {{_ watchLevel}}
-  
+
           else
             a.board-header-btn.js-log-in(
               title="{{_ 'log-in'}}")
@@ -81,7 +81,7 @@ template(name="boardHeaderBar")
           a.board-header-btn-close.js-filter-reset(title="{{_ 'filter-clear'}}")
             i.fa.fa-times-thin
 
-      if currentUser.isBoardMember
+      if canModifyBoard
         a.board-header-btn.js-multiselection-activate(
             title="{{#if MultiSelection.isActive}}{{_ 'multi-selection-on'}}{{else}}{{_ 'multi-selection'}}{{/if}}"
             class="{{#if MultiSelection.isActive}}emphasis{{/if}}")

client/components/boards/boardHeader.js

@@ -97,6 +97,12 @@ BlazeComponent.extendComponent({
   },
 }).register('boardHeaderBar');
 
+Template.boardHeaderBar.helpers({
+  canModifyBoard() {
+    return Meteor.user() && Meteor.user().isBoardMember() && !Meteor.user().isCommentOnly();
+  },
+});
+
 BlazeComponent.extendComponent({
   backgroundColors() {
     return Boards.simpleSchema()._schema.color.allowedValues;