another try for dark theme

libs/widgets/qcodeedit.h

@@ -111,6 +111,9 @@ public:
 	void registerAutoCompletitionClass(int id, ACClassType ac_class, const QString & name, const QIcon & icon = QIcon());
 	bool wordCompletitionEnabled() const { return word_complete; }
 
+	static QBrush invertedBrush(const QBrush & b);
+	static QTextCharFormat invertedFormat(const QTextCharFormat & f);
+
 protected:
 	typedef QPair<QString, QString> StringsPair;
 	typedef QPair<int, QList<ACEntry>> ACSection; // section, ACClass.id -> list of entries