Today, whenever I open a design element or switch to a design element that was previously opened, Designer automatically expands the corresponding category of design elements in the left navigation pane. This can be quite confusing in applications containing a large number of design elements of that category.
For example, our XPages apps usually contain hundreds of Custom Controls. After I open one of them, the only thing I can see in the left navigation pane is a very long list of CCs. I then have to scroll endlessly to open, for example, a Java design element.
I'd much prefer it if Designer would leave design categories collapsed in those cases.