lang: Fix for 'Host not found' problem (Issue #1016)

Signed-off-by: Scott Wilson <i@scottwilson.ca>
allow anonymous TaskProxies to have TaskProxyGuis.
ProxyMixer supports long names. NodeProxy:document - fixed window name.

ProxyMixer - can read long names better by moving the border between
sliders and name views.
NodeProxy: document - fixed window name
updated help file.
TaskProxyGui: enable gui use for anonymous proxies.