SORMAS-Foundation#3274 Fix yes/no saving issue (SORMAS-Foundation#3333)

* SORMAS-Foundation#3274 Fix yes/no saving issue

* SORMAS-Foundation#3274 fix imports

Author: danRosca

sormas-ui/src/main/java/de/symeda/sormas/ui/campaign/campaigndata/CampaignFormBuilder.java

@@ -271,7 +271,7 @@ private float calculateComponentWidth(CampaignFormElementType type, List<Campaig
 	private <T extends Field<?>> void setFieldValue(T field, CampaignFormElementType type, Object value) {
 		switch (type) {
 		case YES_NO:
-			((NullableOptionGroup) field).setValue(value instanceof Boolean ? (Boolean) value : null);
+			((NullableOptionGroup) field).setValue(value);
 			break;
 		case TEXT:
 		case NUMBER: