shared: qssquery: checkParanthesis(): Ignore paranthesis in quotes

Fixes #12

shared/qssquery.cpp

@@ -34,7 +34,11 @@ bool QSSQuery::checkParanthesis(QString expression)
     QStack<QChar> open;
     QStack<QChar> close;
 
+	bool inQuotes = false;
+
     for(QChar &c : expression)
+    {
+		if(!inQuotes)
 		{
 			if(c == '(')
 			{
@@ -45,6 +49,11 @@ bool QSSQuery::checkParanthesis(QString expression)
 				close.push(c);
 			}
 		}
+		if(c == '"')
+		{
+			inQuotes = ! inQuotes;
+		}
+    }
     if(open.size() != close.size())
     {
         return false;