use scoped CSS for toc lables, fixes #473

resources/assets/stylesheets/scss/contentbar.scss

@@ -56,10 +56,6 @@
         .contentbar-icons {
             display: flex;
 
-            label, .consuming_mode_trigger, nav {
-                align-self: center;
-            }
-
             .consuming_mode_trigger {
                 @media (max-width: 767px) {
                     display: none !important;

resources/assets/stylesheets/scss/table_of_contents.scss

@@ -10,15 +10,6 @@ ul.numberedchapters {
     }
 }
 
-label {
-    cursor: pointer;
-    margin-top: 7px;
-}
-
-label[for=cb-toc], label[for=cb-fullscreen] {
-}
-
-
 #cb-toc, #cb-toc-close {
     visibility: hidden;
     display: none;
@@ -76,6 +67,8 @@ label[for=cb-toc], label[for=cb-fullscreen] {
     align-items: center;
 
     label {
+        cursor: pointer;
+        margin-top: 7px;
         margin-right: 15px;
     }
 }