we don't want our own resource show up in the self contact

in some cases the the DNS query might take too long (even though we specified a timeout)
if that happens we need a secondary solution (besides killing the socket) to stop the thread

some devices might have problems contacting the IPv6 DNS server while in sleep mode

* start a new Conversations by pressing mod+space
* automatically start searching when pressing keys in StartConversationsActivity
* when hitting enter when number of search results == 1 open that conversation

fixes #1832

dont check for known mime type

Remove copy of innerkey

The line overwrites this.innerkey with the value that was already there.

spelling fixes

Renaming of variable