Changes to be committed: New search for product's menu
	modified:   costactivitytool.py
 Changes to be committed: 3.1. Add material working
	modified:   costactivitytool.py
 Changes to be committed: Menu 1 . 3.1. Wrong product code
 and material code handled.
	modified:   costactivitytool.py
 Changes to be committed: Add activity corrected
	modified:   costactivitytool.py
 Changes to be committed: Corregido problema float, int and str.
 Materiales funciona. No funciona la carga de datos de materiales
pero sí desde menú.
	modified:   costactivitytool.py