Main purpose of this MR is to replace the old working memory GUI with the new MemoryViewer. While doing so, I noticed that the order was somehow arbitrary and not how the widgets were listed in the code. I changed that, so now we actually have control over the order of the "main widgets" in the tool bar.
Original:
Suggestions:
A) Memory Viewer replaces old WorkingMemoryGui, rest stays the same
B) Roughly from "basic" to "advanced" (C.2: maybe ArViz should come before Memory)
On that note, if you thing other widgets make sense as well, we can also add them (e.g. skill manager, remote gui, ...); although they will need icons :)
