Created attachment 2072 
Patch to implement autoconnect

Hi,

I've started to use Sion, and implemented a feature I'm currently missing: auto-connecting to bookmarks.

The attached patch does this; it adds the necessary GUI and settings to remember an "Autoconnect" boolean per bookmark; it tries to mount every "Autoconnect" bookmark when starting Sion, then every minute so that previously unreachable shares come up automatically when they become available.
If one clicks Disconnect in the main Sion window, it will disable autoconnecting for the session (or until one clicks Connect again), for sanity reasons :)

While at it, I found and fixed a little bug that caused bogus "The entered bookmark name is already in use. Please choose another one." warnings when editing an existing bookmark.

Hope it helps!