- 
    
Sub-task
 - 
    Resolution: Fixed
 - 
    
Critical
 - 
    None
 - 
    None
 - 
    None
 
When using ExtJS 4.2.3, there's a bug when calling ServerComm.callMethod with the waitMessage option set to true:
TypeError: Cannot read property 'mask' of undefined
    at Ext.define.show (http://localhost:8080/cms/plugins/extjs4/resources/js/ext-all-debug.js:41752:25)
    at Ext.define.send (http://localhost:8080/cms/kernel/resources/js/Ametys/data/ServerComm.i18n.js:306:26)
    at Ext.define.callMethod (http://localhost:8080/cms/kernel/resources/js/Ametys/data/ServerComm.i18n.js:360:9)
    at Ext.define._sendGetContentTypeRequest (http://localhost:8080/cms/plugins/cms/resources/js/Ametys/cms/content/ContentTypeDAO.i18n.js:146:26)
    ...