refs #16710 [fid_adlr] add missing icon for sid 103

* add icon and scss of iconcategory
* use png from docx file of refs #15767

themes/fid_adlr/scss/_iconcategory.scss

@@ -94,6 +94,10 @@ $imo-image-prefix: 'iconcategory' !default;
   content: url('../images/category-icons/notes-offline.png');
 }
 
+.#{$imo-image-prefix}-notes-online:before {
+  content: url('../images/category-icons/notes-online.png');
+}
+
 .#{$imo-image-prefix}-software:before {
   content: url('../images/category-icons/software.png');
 }