allow 0mA beam current for cavities in the RF lab (then avoid calculations that uses this variable).
add the newer B plant in the WR RF lab.
fixing issues with the facade name build.
add the new feature to specify the formula in the facade attributes. And allow the user to modify those formulas 'on the fly'. This requires some verifications in the introduced string that it will may require further extension.
Add a reset button the the facadeAdjustments to apply those adjustments without closing the auxiliar window.

git-svn-id: svn+ssh://controls01/siciliarep/svn/trunk/tango_client/ctrflyrtech_fdl/trunk@13245 a18efa20-c439-0410-bf20-9b91ec695b4c