handle dispatch of message type from devtools

[joprice]

Description

The redux devtools allow triggering actions from the UI, but the only message type currently handled by the elmish debugger is MsgTypes.Dispatch. I was able to modify the debugger code to support his by adding an inflater argument for the 'msg type:

| msg when msg.``type`` = MsgTypes.Action ->
          let msg: 'msg = msgInflater (JS.JSON.parse (!!msg.action))
          dispatch (msg)

I'm not very familiar with redux tooling, so not sure there's anything else to handle besides this, but this is enough to allow me to trigger side actions manually to easily reproduce side-effects.

[joprice]

I noticed the actionCreators config option that lets you provide a set of preconfigured values for sending actions, and it seems that it structures the actions in a way that are different than the serialized form. I'd like to make use of that, so I think my above suggestion is too naive.

[MangelMaxime]

Hello,

If the above improve the current situation and don't break anything personally I am ok with adding it.