Context menu for "Open Explorer", "Open Command Line", and "System Open"

This topic has come up a while before, but it's buried in another discussion.
I post it here again, so that I will be able to find it again on my next fresh install of Idea ;)

You can simply add external tool definitions to get these features in the context menu.

Open Settings->IDE->External Tools and add definitions like in the attached screenshots.

Or simply open the xml file in Idea's config/tools folder and add the tool definitions like this (while Idea is not running):
]]>