Partly revert "Fixes #481 - Sort buffer views alphabetically."

This reverts commit e9bb37281e0304db32d7dc8bfb8d49e9eabf7503.
produce a Crash-Log on SIGQUIT and continue running
patch to add Quassel support to OpenSSL's s_client
Windows doesn't have SIGQUIT
splitdebug.sh
new file:   dev-notes/contributors-update-hook-for-cia
don't request additional backlog for temp hidden buffers

When using the PerBufferUnreadBacklogRequester, don't fetch additional
backlog for temporarily hidden buffers.
new file:   tx-sync.sh
von wegen unused…

Partly reverts 'b3cf44aa5773bb6a6e0a1ba8d0c1add841281b4b'
tx-sync.sh: fix for dumb terminal mode
BufferWidget: Remove minimumSize constraint
Remove brackets around nick names
Add brackets around sender when copying ChatLines

Only apply when Message::Type == Plain, though.
Remove brackets from default timestamp setting