Added Toolbar Button -> selected Text doesn't get included in macro

I’ve added some toolbar buttons for the code-macro with specific programming languages preselected. Example Button:

config['xwiki-macro'] = config['xwiki-macro'] || {};
config['xwiki-macro'].insertButtons = [
   {
     commandId: 'xwiki-macro-insert-code-sql',
     macroCall: {
       name: 'code',
       parameters: {
         language: "sql"
       }
     }
   }
 ];

To reproduce:

• Add a custom button like mine above to your toolbar
• Edit a page and select some text
• Click on the custom added button

--> The selected text doesn't get prefilled into the code-macro popup window (like it would when you would use the standard "Xwiki macro" button -> "code".

[Link to Forum-Post I made about it|https://forum.xwiki.org/t/adding-editor-toolbar-button-select-marked-text-for-macro/4819].