Send long text as an attachment instead of inline

Remove Android length warning

Handle incoming long message attachments

Show long download pending status in message bubble

Fix the width of the smallest spinner

Remove Android length warning from HTML templates

js/models/conversations.js

@@ -921,12 +921,21 @@
           messageWithSchema.attachments.map(loadAttachmentData)
         );
 
+        const {
+          body: messageBody,
+          attachments: finalAttachments,
+        } = Whisper.Message.getLongMessageAttachment({
+          body,
+          attachments: attachmentsWithData,
+          now,
+        });
+
         // Special-case the self-send case - we send only a sync message
         if (this.isMe()) {
           const dataMessage = await textsecure.messaging.getMessageProto(
             destination,
-            body,
-            attachmentsWithData,
+            messageBody,
+            finalAttachments,
             quote,
             preview,
             now,
@@ -945,8 +954,8 @@
             case Message.PRIVATE:
               return textsecure.messaging.sendMessageToNumber(
                 destination,
-                body,
-                attachmentsWithData,
+                messageBody,
+                finalAttachments,
                 quote,
                 preview,
                 now,
@@ -958,8 +967,8 @@
               return textsecure.messaging.sendMessageToGroup(
                 destination,
                 groupNumbers,
-                body,
-                attachmentsWithData,
+                messageBody,
+                finalAttachments,
                 quote,
                 preview,
                 now,