Add directory or transport status should be reflected immediately

[mitra42]

If change directories (e.g. plug in new disk), or connection to server goes down.

• then DM notices about 30 seconds later when scans,
• browser: dweb-transports figures out when it does its next info req,
• dweb-archive / Page component only finds out when it updates (change in item or message).

Fix should allow for a callback or Event handler (better) on dweb-transports.(whatever checks for /info) .

[mitra42]

Currently ... dweb-mirror.CrawlManager.constructor(); DM.mirrorHttp.sendInfo() ->
DTS.p_statuses() -> DTS.statuses() -> transportInstance.status

Instead ...

• [x] UI element.componentDidMount should call DTS.addEventListener. with bound function
• [x] UI element.componentWillUnMount should call DTS.removeEventListener with bound function "statuseschanged", value: statuses
• [x] TransportHTTP.p_setup1 and anything changing status should call setStatus
• [x] TransportHTTP.setStatus via Transport.setStatus should call DTS.statusChanged -> DTS.dispatchEvent("statuschanged", statuses)
• [x] TransportX.status= replaced by TransportX.setStatus
• [x] Obsolete in various places - see TransportHTTP & DA.Page.jsx "TODO-DM265" and DA.ReactSupport and similar in other TransportX

[mitra42]

Bugs ...

• [x] Its comparing cooked info with "GATEWAY" against raw "HTTP"
• [x] Not getting through to status

[mitra42]

I think this is all working now