Make ParaView aware of .pvsm files on open

ParaView 5.4.0, Windows, local server.
Load can.exo, and then create a .pvsm by saving state. Close ParaView.
Right click on the .pvsm file. Say "open with", then select the ParaView executable. ParaView will open, and ask the user what reader to use! It should open as a state file.

The goal is to allow Windows to bind .pvsm files with ParaView, so you can click on the dataset and have ParaView open (assuming user has set their system up that way).

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information