Move the dropdown arrow button in the folder tree of the content perspective a bit to the left so that (on a Mac) it won't be overlapped by the appearing scrollbar

Currently the spacing between the right side of the folder tree panel and the dropdown button is about 9px. The width of the scrollbar is about 16px.
Increasing the spacing to 20px will prevent it from ever being overlapped by the scrollbar.

(Note that in case of long folder names, the dropdown button is already rendered on top of the folder name, so its behaviour can remain unchanged.)