Ignore 'Torrent addition dialog' setting if the file doesn't exist:

Allows to post error message to log
Add setting to ignore RSS rule matches for X days
Implement episode filter for rss downloader

Conflicts:
	src/rss/rssdownloadrule.cpp
Add tooltip to episode filter text edit
[WIP] Implement open & select file in file manager

Conflicts:
	src/transferlistwidget.cpp