Connect FormClosed event to handler

fixes luckyrat/KeeFox#254
Merge pull request #255 from dlech/master

Connect FormClosed event to handler
Speculatively try to open a webSocket connection every 73 seconds to allow connections for users who have badly configured HTTP proxies but functioning web socket connectivity
Merge branch 'master' of github.com:luckyrat/KeeFox
prevent user selecting legacy port as alternative for web socket port
Websocket listener in Fleck2 library now supports binding only to the loopback address. KeePassRPC will bind only to loopback by default, advanced users can bind to all interfaces by setting the KeePass XML config option "KeePassRPC.webSocket.bindOnlyToLoopback" to false
Merge branch 'master' into ui2014