Ref T82, allow to sort by severity

src/blackmisc/statusmessagelist.cpp

@@ -120,6 +120,11 @@ namespace BlackMisc
         }
     }
 
+    void CStatusMessageList::sortBySeverity()
+    {
+        this->sortBy(&CStatusMessage::getSeverity);
+    }
+
     void CStatusMessageList::removeWarningsAndBelow()
     {
         if (this->isEmpty()) { return; }

src/blackmisc/statusmessagelist.h

@@ -88,6 +88,9 @@ namespace BlackMisc
         //! And higher (more critical) severity will be clipped to given severity
         void clampSeverity(CStatusMessage::StatusSeverity severity);
 
+        //! Sort by severity, lowest first
+        void sortBySeverity();
+
         //! Remove warnings and below
         void removeWarningsAndBelow();