I don\'t know how, but my STS has got duplicate toolbars items and I am not sure how to remove them. Here is how my duplicated toolbar looks like.
I want to
Not an actual answer, more additional info that I hope will help track down the problem. I am having the same issue with Version: 2018-12 (4.10.0), Build: 20181214-0600.
I opened the workbench.xmi file mentioned above. This was the section I found by searching for "Open a Terminal", which is the tooltip on a repeated icon.
Draggable
When I refreshed workbench.xmi I found this (two icons appear):
Draggable
I notice, also, that the ids have been updated.
John