when having open a bunch of editor windows then CCS will create a continuation mark on the right side of the window tabs of the form ">>12".
klicking with the mouse on that item will open a light yellow colored vertical box (looks like a tool tip) that offers an input line on top and lists the files that are open in editor below of that.
if there are more files than the box can hold then a scroll bar is added on the right.
now having opened that window with the mouse and moving the mouse pointer onto the file list (the file under the cursor gets a gray background)...
still the commonly available mouse wheel will not lead to any scroll operation in that area.
only when the cursor down key on the keyboard gets pressed once (making the top file in the list added a blue background) then scrolling with the wheel suddenly gets functional. - the ergonomy of CCS can be noticeably improved in that area.
as a second problem in quickly handling higher numbers of opened files in the editor it turned out that if you go for the list the visible tabs are separated from the hidden tabs, so you have to scroll down for both in order to find the file in question. i would rather like to have them simply sorted a-to-z and highlighted with bold/non-bold to avoid (as its the present case) digging into two places in the two consecutive listing. - maybe you can improve the behaviour in that area.