Help: Remove funny restriction

There is no reason why some part of the help mode couldn't provide
help.

Change-Id: I9c28dc1dacf122e5f3828144a0e386a9f7e2b6c2
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>

src/plugins/help/helpplugin.cpp

@@ -559,9 +559,6 @@ static QUrl findBestLink(const QMap<QString, QUrl> &links, QString *highlightId)
 
 void HelpPlugin::showContextHelp()
 {
-    if (ModeManager::currentMode() == m_mode)
-        return;
-
     // Find out what to show
     QMap<QString, QUrl> links;
     QString idFromContext;