+ tDrugsNames: added the unit of measurement (ID_MeasurementUnit) (optional)
+ tDrugsNames: added the measurement type (ID_MeasurementType) (optional)
* TfrmEditDrugs_Names: the company name is optional
+ TfrmEditDrugs_Names: you can assign a unit of measurement to the drug and a measurement type.
The measurement type is necessary to understand which measurement the drug can control (when it is applicable).
I.e. the drugs that contain insuline control the levels of glicemie
* tDrugsPrescriptions: removed the ck_tDrugsPrescriptions_ProblemOrPathology constraint so you leave the problem and the pathology both empty
* TfrmEditDrugs_Prescriptions: the problem and the pathology can be left both empty
* TfrmEditDrugs: when you change the drug name the unit of measurements is read and set again
* TfrmEditDrugs_Prescriptions: when you change the drug name the unit of measurements is read and set again
+ Updated Italian and English translations