Custom Tool Box Popup Functionality

Yet another attempt to try and get required customistation from microstation. How to I make my custom toolboxes popup enabled?

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dialog toolbox [CUSTOM NAME] popup 

Only opens the new toolbox to a static position. I need it to pop up directly under my mouse cursor regardless of the cursor position. Most toolboxes allow this.

Ribbon groups are severely limited because they close as soon as you make a selection, which is not ideal if you want to scroll a dropdown list.