PLT-7287 Move access token text in user list to under the dropdown (#7099)

* Move access token text in user list to under the dropdown

* Updating UI for token help text (#7107)

webapp/sass/base/_typography.scss

@@ -22,6 +22,10 @@ body {
     font-family: 'Open Sans', sans-serif;
 }
 
+.light {
+    @include opacity(.6);
+}
+
 .word-break--all {
     word-break: break-all;
 }

webapp/sass/utils/_modifiers.scss

@@ -83,6 +83,10 @@
 .margin-top {
     margin-top: 7px;
 
+    &.half {
+        margin-top: 4px;
+    }
+
     &.x2 {
         margin-top: 14px;
     }