check the existence of destination folder when editing filter rule.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3196 ee746299-78ed-0310-b773-934348b2243d
limit the recursion level of tree scan to 64.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3197 ee746299-78ed-0310-b773-934348b2243d
updated po and version.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3198 ee746299-78ed-0310-b773-934348b2243d
made the button sensitivity and Stop/Refresh label of remote mailbox dialog consistent.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3199 ee746299-78ed-0310-b773-934348b2243d
changed safe mode option to '--safe-mode'.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3200 ee746299-78ed-0310-b773-934348b2243d
remote mailbox: do not disconnect immediately but send QUIT on normal POP3 errors.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3201 ee746299-78ed-0310-b773-934348b2243d
remote mailbox: Changed 'Refresh' button/menu to 'Resume'.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3202 ee746299-78ed-0310-b773-934348b2243d
updated po files.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3203 ee746299-78ed-0310-b773-934348b2243d
updated command line help.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3204 ee746299-78ed-0310-b773-934348b2243d
updated NEWS.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3205 ee746299-78ed-0310-b773-934348b2243d
made 3.4.0beta1 release.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3207 ee746299-78ed-0310-b773-934348b2243d
nsis: translate Start Menu shortcuts.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3209 ee746299-78ed-0310-b773-934348b2243d
implemented new message notification popup window.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3211 ee746299-78ed-0310-b773-934348b2243d
added option: 'Show notification window when new messages arrive'

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3212 ee746299-78ed-0310-b773-934348b2243d
increased version.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3213 ee746299-78ed-0310-b773-934348b2243d
updated po files.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3214 ee746299-78ed-0310-b773-934348b2243d
updated NEWS.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3215 ee746299-78ed-0310-b773-934348b2243d
modified notification window.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3216 ee746299-78ed-0310-b773-934348b2243d
added plug-in API for notification window.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3217 ee746299-78ed-0310-b773-934348b2243d
adjusted paddings of notification window.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@3218 ee746299-78ed-0310-b773-934348b2243d