The node button in the organisation chart is displayed far too small and inconspicuously

Is your feature request related to a problem? Please describe.

The node button in the organisation chart is displayed far too small and inconspicuously and is therefore usually not recognisable at first glance for many users. The design should be adapted

<foreignObject class="node-button-foreign-object" width="40" height="40" x="-20" y="-20" style="overflow: visible;"><div class="node-button-div" style="pointer-events: none; display: flex; width: 100%; height: 100%;"><div style="border-radius:3px;padding:3px;font-size:10px;margin:auto auto;background-color:lightgray"> <div style="margin-top:-20px;font-size:25px">ˬ</div> </div></div></foreignObject>

Describe the solution you'd like

The node button should be 1. larger and 2. more contrasting. Possibly with a thicker arrow. It is a design issue and therefore more for GUI designers

Describe alternatives you've considered

No response

Additional context

No response

Start from the organisation chart node button shown in the issue and inspect the implementation that produces its SVG/HTML styling. Compare the current button with the attached screenshot, then make it larger and more contrasting, with a clearer or thicker arrow. Done means the control is immediately recognisable at a glance.