Remove the comments from qss

src/blackgui/stylesheetutility.cpp

@@ -151,7 +151,7 @@ namespace BlackGui
             {
                 if (needsWatcher) { m_fileWatcher.addPath(absolutePath); }
                 QTextStream in(&file);
-                const QString c = in.readAll();
+                const QString c = removeComments(in.readAll(), true, true);
                 const QString f = fileInfo.fileName().toLower();
 
                 // keep even empty files as placeholders

src/blackmisc/stringutils.cpp

@@ -433,6 +433,19 @@ namespace BlackMisc
         return in;
     }
 
+    QString removeComments(const QString &in, bool removeSlashStar, bool removeDoubleSlash)
+    {
+        QString copy(in);
+
+        thread_local const QRegularExpression re1("\\/\\*(.|\\n)*?\\*\\/");
+        if (removeSlashStar) { copy.remove(re1); }
+
+        thread_local const QRegularExpression re2("\\/\\/.*");
+        if (removeDoubleSlash) { copy.remove(re2); }
+
+        return copy;
+    }
+
 } // ns
 
 //! \endcond

src/blackmisc/stringutils.h

@@ -289,6 +289,9 @@ namespace BlackMisc
     //! Convert string to bool
     BLACKMISC_EXPORT QString joinStringSet(const QSet<QString> &set, const QString &separator);
 
+    //! Remove comments such as /** **/ or //
+    BLACKMISC_EXPORT QString removeComments(const QString &in, bool removeSlash, bool removeDoubleSlash);
+
     namespace Mixin
     {
         /*!