fix context not checked for warnings

closes sk22#518

mastodon/src/main/java/org/joinmastodon/android/model/Filter.java

@@ -15,9 +15,7 @@ import java.util.regex.Pattern;
 
 @Parcel
 public class Filter extends BaseModel{
-	@RequiredField
 	public String id;
-	@RequiredField
 	public String phrase;
 	public String title;
 	public transient EnumSet<FilterContext> context=EnumSet.noneOf(FilterContext.class);

mastodon/src/main/java/org/joinmastodon/android/model/FilterResult.java

@@ -1,8 +1,15 @@
 package org.joinmastodon.android.model;
 
+import org.joinmastodon.android.api.ObjectValidationException;
 import org.parceler.Parcel;
 
 @Parcel
 public class FilterResult extends BaseModel {
     public Filter filter;
+
+    @Override
+    public void postprocess() throws ObjectValidationException {
+        super.postprocess();
+        if (filter != null) filter.postprocess();
+    }
 }

mastodon/src/main/java/org/joinmastodon/android/model/Status.java

@@ -101,6 +101,9 @@ public class Status extends BaseModel implements DisplayItemsParent, Searchable{
 			card.postprocess();
 		if(reblog!=null)
 			reblog.postprocess();
+		if(filtered!=null)
+			for(FilterResult fr : filtered)
+				fr.postprocess();
 
 		spoilerRevealed=GlobalUserPreferences.alwaysExpandContentWarnings || !sensitive;
 		if (visibility.equals(StatusPrivacy.LOCAL)) localOnly = true;