Introduce blacklisted plugins to core

include/Engine.h

@@ -88,6 +88,8 @@ public:
 		return s_projectJournal;
 	}
 
+	static bool ignorePluginBlacklist();
+
 #ifdef LMMS_HAVE_LV2
 	static class Lv2Manager * getLv2Manager()
 	{

include/PluginIssue.h

@@ -44,6 +44,7 @@ enum PluginIssueType
 	portHasNoMax,
 	featureNotSupported, //!< plugin requires functionality LMMS can't offer
 	badPortType, //!< port type not supported
+	blacklisted,
 	noIssue
 };
 
@@ -60,6 +61,7 @@ public:
 		: m_issueType(it), m_info(msg)
 	{
 	}
+	PluginIssueType type() const { return m_issueType; }
 	friend QDebug operator<<(QDebug stream, const PluginIssue& iss);
 };