For those who'd like to use their mouse scroll wheel to scroll the tool panel, there's a new option in Preference to disable the vertical scrollbar (see issue 735). The side effect of that is better stability of the curve editor's size.

rtgui/filepanel.cc

@@ -252,3 +252,7 @@ void FilePanel::loadingThumbs(Glib::ustring str, double rate)
 		parent->setProgressStr(str);
 	parent->setProgress( rate );
 }
+
+void FilePanel::updateTPVScrollbar (bool hide) {
+	tpc->updateTPVScrollbar (hide);
+}