Native SVG support

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -3173,8 +3173,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             List<EntityAttachment> images = new ArrayList<>();
             if (thumbnails && bind_extras)
                 for (EntityAttachment attachment : attachments)
-                    if (attachment.isAttachment() &&
-                            (attachment.isImage() || "image/svg+xml".equals(attachment.getMimeType())))
+                    if (attachment.isAttachment() && attachment.isImage())
                         images.add(attachment);
             adapterImage.set(images);
             grpImages.setVisibility(images.size() > 0 ? View.VISIBLE : View.GONE);

app/src/main/java/eu/faircode/email/DB.java

@@ -71,7 +71,7 @@ import io.requery.android.database.sqlite.SQLiteDatabase;
 // https://developer.android.com/topic/libraries/architecture/room.html
 
 @Database(
-        version = 226,
+        version = 227,
         entities = {
                 EntityIdentity.class,
                 EntityAccount.class,
@@ -2269,7 +2269,7 @@ public abstract class DB extends RoomDatabase {
                         db.execSQL("ALTER TABLE `attachment` ADD COLUMN `related` INTEGER");
                         db.execSQL("DROP TRIGGER IF EXISTS `attachment_insert`");
                         db.execSQL("DROP TRIGGER IF EXISTS `attachment_delete`");
-                        createTriggers(db, true);
+                        createTriggers(db);
                     }
                 }).addMigrations(new Migration(223, 224) {
                     @Override
@@ -2291,6 +2291,14 @@ public abstract class DB extends RoomDatabase {
                         logMigration(startVersion, endVersion);
                         db.execSQL("ALTER TABLE `answer` ADD COLUMN `snippet` INTEGER NOT NULL DEFAULT 0");
                     }
+                }).addMigrations(new Migration(226, 227) {
+                    @Override
+                    public void migrate(@NonNull SupportSQLiteDatabase db) {
+                        logMigration(startVersion, endVersion);
+                        db.execSQL("DROP TRIGGER IF EXISTS `attachment_insert`");
+                        db.execSQL("DROP TRIGGER IF EXISTS `attachment_delete`");
+                        createTriggers(db, true);
+                    }
                 }).addMigrations(new Migration(998, 999) {
                     @Override
                     public void migrate(@NonNull SupportSQLiteDatabase db) {

app/src/main/java/eu/faircode/email/ImageHelper.java

@@ -93,6 +93,7 @@ class ImageHelper {
 
     // https://developer.android.com/guide/topics/media/media-formats#image-formats
     static final List<String> IMAGE_TYPES = Collections.unmodifiableList(Arrays.asList(
+            "image/svg+xml", // native
             "image/bmp",
             "image/gif",
             "image/jpeg",