Minor issues related to release

* Add shortcut for Plot Editor, and modify how command features are triggered
Use Ctrl-E to launch the Plot Editor.

* Add optional use of NOECHO and ECHO keywords in GRDECL files
* Add ECHO keywords to sector model export
* Add Help button to Preferences

ApplicationLibCode/ProjectDataModel/RimExportInputPropertySettings.h

@@ -34,6 +34,7 @@ public:
 
     caf::PdmField<QString> fileName;
     caf::PdmField<QString> eclipseKeyword;
+    caf::PdmField<bool>    writeEchoInGrdeclFiles;
 
 protected:
     void defineEditorAttribute( const caf::PdmFieldHandle* field,