Correct contextual send language.

1) Use "secure" and "insecure" vs "encrypted" and "unencrypted.

2) Use MMS instead of SMS where appropriate.

Fixes #1602

res/menu/conversation_button_context.xml

@@ -3,8 +3,13 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:title="@string/conversation_button_context__send_textsecure_message"
           android:id="@+id/menu_context_send_push" />
-    <item android:title="@string/conversation_button_context__send_encrypted_sms"
+    <item android:title="@string/conversation_button_context__send_secure_sms"
           android:id="@+id/menu_context_send_encrypted_sms" />
-    <item android:title="@string/conversation_button_context__send_unencrypted_sms"
+    <item android:title="@string/conversation_button_context__send_insecure_sms"
           android:id="@+id/menu_context_send_unencrypted_sms" />
+    <item android:title="@string/conversation_button_context__send_secure_mms"
+          android:id="@+id/menu_context_send_encrypted_mms" />
+    <item android:title="@string/conversation_button_context__send_insecure_mms"
+          android:id="@+id/menu_context_send_unencrypted_mms" />
+
 </menu>

res/menu/conversation_button_context_insecure_push.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:title="@string/conversation_button_context__send_textsecure_message"
-          android:id="@+id/menu_context_send_push" />
-    <item android:title="@string/conversation_button_context__send_unencrypted_sms"
-          android:id="@+id/menu_context_send_unencrypted_sms" />
-</menu>

res/menu/conversation_button_context_secure_sms.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:title="@string/conversation_button_context__send_encrypted_sms"
-          android:id="@+id/menu_context_send_encrypted_sms" />
-    <item android:title="@string/conversation_button_context__send_unencrypted_sms"
-          android:id="@+id/menu_context_send_unencrypted_sms" />
-</menu>

res/values/strings.xml

@@ -787,8 +787,10 @@
 
     <!-- conversation_button_context -->
     <string name="conversation_button_context__send_textsecure_message">Send TextSecure message</string>
-    <string name="conversation_button_context__send_unencrypted_sms">Send unencrypted SMS</string>
-    <string name="conversation_button_context__send_encrypted_sms">Send encrypted SMS</string>
+    <string name="conversation_button_context__send_secure_sms">Send secure SMS</string>
+    <string name="conversation_button_context__send_insecure_sms">Send insecure SMS</string>
+    <string name="conversation_button_context__send_secure_mms">Send secure MMS</string>
+    <string name="conversation_button_context__send_insecure_mms">Send insecure MMS</string>
 
     <!-- conversation_callable -->
     <string name="conversation_callable__menu_call">Call</string>

src/org/thoughtcrime/securesms/ConversationActivity.java

@@ -322,14 +322,24 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
       Recipient primaryRecipient  = getRecipients() == null ? null : getRecipients().getPrimaryRecipient();
       boolean   hasSession        = Session.hasSession(this, masterSecret, primaryRecipient);
 
-      int context;
+      getMenuInflater().inflate(R.menu.conversation_button_context, menu);
 
-      if      (isPushDestination && hasSession) context = R.menu.conversation_button_context_secure_push;
-      else if (isPushDestination)               context = R.menu.conversation_button_context_insecure_push;
-      else if (hasSession)                      context = R.menu.conversation_button_context_secure_sms;
-      else                                      return;
+      if (attachmentManager.isAttachmentPresent()) {
+        menu.removeItem(R.id.menu_context_send_encrypted_sms);
+        menu.removeItem(R.id.menu_context_send_unencrypted_sms);
+      } else {
+        menu.removeItem(R.id.menu_context_send_encrypted_mms);
+        menu.removeItem(R.id.menu_context_send_unencrypted_mms);
+      }
 
-      getMenuInflater().inflate(context, menu);
+      if (!isPushDestination) {
+        menu.removeItem(R.id.menu_context_send_push);
+      }
+
+      if (!hasSession) {
+        menu.removeItem(R.id.menu_context_send_encrypted_mms);
+        menu.removeItem(R.id.menu_context_send_encrypted_sms);
+      }
     }
   }
 
@@ -337,7 +347,9 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
   public boolean onContextItemSelected(android.view.MenuItem item) {
     switch (item.getItemId()) {
       case R.id.menu_context_send_push:            sendMessage(false, false); return true;
+      case R.id.menu_context_send_encrypted_mms:
       case R.id.menu_context_send_encrypted_sms:   sendMessage(false, true);  return true;
+      case R.id.menu_context_send_unencrypted_mms:
       case R.id.menu_context_send_unencrypted_sms: sendMessage(true, true);   return true;
     }