Improved folder path presentation in page title (use unified delimiter, localize path).
E.g. folder "INBOX.test" will be displayed as "Inbox >> test"
Remove deprecated functions (from bc.php file) usage in plugins
DOn't use deprecated jQuery.browser, CS fixes (tabs to spaces)
Fix format=flowed unfolding on quoted lines; added tests for rcube_mime::format_flowed() and rcube_mime::unfold_flowed()
Don't rely on Subject header only