limit max message length to 2000 characters.

Set task time limit to 3 minutes.

background.html

@@ -148,7 +148,7 @@
               <div class='attachment-previews'></div>
               <div class='flex'>
                 <button class='emoji' {{#disable-inputs}} disabled="disabled" {{/disable-inputs}}></button>
-                <textarea class='send-message' placeholder='{{ send-message }}' rows='1' dir='auto' {{#disable-inputs}} disabled="disabled" {{/disable-inputs}}></textarea>
+                <textarea maxlength='2000' class='send-message' placeholder='{{ send-message }}' rows='1' dir='auto' {{#disable-inputs}} disabled="disabled" {{/disable-inputs}}></textarea>
                 <div class='capture-audio hide'>
                     <button class='microphone' {{#disable-inputs}} disabled="disabled" {{/disable-inputs}}></button>
                 </div>

js/views/conversation_view.js

@@ -1623,7 +1623,10 @@
       }
 
       const input = this.$messageField;
-      const message = window.Signal.Emoji.replaceColons(input.val()).trim();
+      const inputMessage = window.Signal.Emoji.replaceColons(input.val()).trim();
+
+      // Limit the message to 2000 characters
+      const message = inputMessage.substring(0, Math.min(2000, inputMessage.length));
 
       try {
         if (!message.length && !this.fileInput.hasFiles()) {

libtextsecure/task_with_timeout.js

@@ -7,7 +7,7 @@
   window.textsecure = window.textsecure || {};
 
   window.textsecure.createTaskWithTimeout = (task, id, options = {}) => {
-    const timeout = options.timeout || 1000 * 60 * 2; // two minutes
+    const timeout = options.timeout || 1000 * 60 * 3; // three minutes
 
     const errorForStack = new Error('for stack');
     return () =>