ID 377761 - Any tools that are added to the Tool HUD cannot be removed and the delete icon is only appearing for the right-most tool

Problem summary
Any tools that are added to the Tool HUD cannot be removed and the delete icon is only appearing for the right-most tool. 

Customer reported version
Modo 12.2v1 

Customer reported platform
MacOSX 10.14 

Steps to reproduce

1) Open Modo. 

2) Use "Ctrl + Tab" to open the Tool HUD. 

3) Hover the mouse arrow over the tools in the HUD and notice that only the right-most tool icon has the (X) delete icon.

4) Clicking on the delete icon doesn't remove the tool from the HUD. 

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Modo 13.2v1 - Windows 10 - CentOS 7 - MacOSX 10.14

Modo 13.1v1 - Windows 10 - CentOS 7 - MacOSX 10.14
Modo 12.2v1 - Windows 10 - CentOS 7 - MacOSX 10.14
Modo 12.1v2 - Windows 10 - CentOS 7 - MacOSX 10.14 *The right-most tool in the Tool HUD can be removed with the delete icon only appearing for this tool. 
Modo 12.1v1 - Windows 10 - CentOS 7 - MacOSX 10.14 - regression 

Unable to reproduce bug in:
Modo 12.0v1 - Windows 10 - CentOS 7 - MacOSX 10.14 

Earliest version tested
Modo 12.0v1 - This issue no longer appears in this version and has regressed.

Expected behaviour
Any tools that are in the Tool HUD should be removable with a small (X) delete icon appearing when hovering over each of these tools. 

Actual behaviour
In Modo 12.2v1, tools in the Tool HUD can't be deleted and only the right-most tool has the delete icon when hovering the mouse pointer over it. 

In earlier versions, you can delete the right-most tool but the other tools can't be removed.