Don't use buffhidden=delete on scratch buffers
Don't use buffhidden=delete on scratch buffers

With this set, if a note is opened and then switched away from it
disappears which was not intended functionality.

Fixes https://github.com/mrtazz/simplenote.vim/issues/44

sanchon/simplenote.vim,kidpixo/simplenote.vim,sanchon/simplenote.vim,mrtazz/simplenote.vim,yuex/simplenote.vim,mrtazz/simplenote.vim