SORMAS-Foundation#2946 - Disable disease fields when creating a source contact

Author: MateStrysewske

sormas-ui/src/main/java/de/symeda/sormas/ui/contact/ContactCreateForm.java

@@ -269,6 +269,9 @@ protected void addFields() {
 			getContent().addComponent(removeCaseButton, REMOVE_CASE_LOC);
 			removeCaseButton.setVisible(false);
 		}
+		if (asSourceContact) {
+			setEnabled(false, ContactDto.DISEASE, ContactDto.DISEASE_DETAILS);
+		}
 
 		addValueChangeListener(e -> {
 			updateFieldVisibilitiesByCase(hasCaseRelation);