preview/test sticky feature

[ntno]

previewing changes from #141
add further discussion to #141

we might need this part:
Gioni06/terminal.css@2923b48#diff-b2b324d39961db64b2c30565346384ece9a6b41fea84e2abbc4d52f18460d067R105-R109

      .components-grid aside {
        position: sticky;
        top: calc(var(--global-space) * 2);
      }