Don't use white spaces as separator in RSS "must not contain" rules

This RegExp uses both white spaces and | as separator.
Use only the latter and drop the RegExp as it is no longer required.

src/rss/automatedrssdownloader.cpp

@@ -605,7 +605,7 @@ void AutomatedRssDownloader::updateMustNotLineValidity()
   if (ui->checkRegex->isChecked())
     tokens << text;
   else
-    tokens << text.split(QRegExp("[\\s|]"));
+    tokens << text.split("|");
   foreach (const QString &token, tokens) {
     QRegExp reg(token, Qt::CaseInsensitive, ui->checkRegex->isChecked() ? QRegExp::RegExp : QRegExp::Wildcard);
     if (!reg.isValid()) {

src/rss/rssdownloadrule.cpp

@@ -133,7 +133,7 @@ void RssDownloadRule::setMustNotContain(const QString &tokens)
   if (m_useRegex)
     m_mustNotContain = QStringList() << tokens;
   else
-    m_mustNotContain = tokens.split(QRegExp("[\\s|]"));
+    m_mustNotContain = tokens.split("|");
 }
 
 RssDownloadRulePtr RssDownloadRule::fromVariantHash(const QVariantHash &rule_hash)