Improve documentation for spell checkers

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed issue #2073: Remove Entry of remote in "Remote Url" box in sync window

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Save list of selected files with CRLF eol to facilitate viewing

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>