refs #314, new icons for formatters

* Moved methods to cpp file (less recompilation)
* Background of icons can be changed
* refs #322, changed to index based approach for retrieving icons (faster)
* therfore: sorted icons per name, easier to keep in sync

src/blackmisc/icon.h

@@ -49,6 +49,9 @@ namespace BlackMisc
         //! Rotate by given degrees
         void setRotation(const BlackMisc::PhysicalQuantities::CAngle &rotate);
 
+        //! Set descriptive text
+        void setDescriptiveText(const QString &text) { this->m_descriptiveText = text; }
+
         //! Equal operator ==
         bool operator ==(const CIcon &other) const;