IDEA-131568 Wrong fold region is unfolded on mouse click

(cherry picked from commit 7fdfed0e1a557ae41ff92a9e150927a92688c94f)
make doOkAction  public in IdeSettingsDialog
(cherry picked from commit 492d3b6)
IDEA-120252 Plugin Manager: "Restart IntelliJ IDEA" button does nothing
(cherry picked from commit 6773210)
update artworks
IDEA-129372 Draw outline of the auto-hideable scrollbar in the editor's right gutter
(cherry picked from commit 80d8b7f)