Fix bug where signature wasn't changed on identity selection when editing a draft (#1489229)

Conflicts:

	program/js/app.js

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix bug where signature wasn't changed on identity selection when editing a draft (#1489229)
 - Fix IMAP SETMETADATA parameters quoting (#1489231)
 - Fix "could not load message" error on valid empty message body (#1489228)
 - Fix handling of message/rfc822 attachments on message forward and edit (#1489214)

program/js/app.js

@@ -3069,7 +3069,7 @@ function rcube_webmail()
       this.set_caret_pos(input_message, this.env.top_posting ? 0 : $(input_message).val().length);
       // add signature according to selected identity
       // if we have HTML editor, signature is added in callback
-      if (input_from.prop('type') == 'select-one' && !this.env.opened_extwin) {
+      if (input_from.prop('type') == 'select-one') {
         this.change_identity(input_from[0]);
       }
     }
@@ -3400,6 +3400,15 @@ function rcube_webmail()
     if (!show_sig)
       show_sig = this.env.show_sig;
 
+    // first function execution
+    if (!this.env.identities_initialized) {
+      this.env.identities_initialized = true;
+      if (this.env.show_sig_later)
+        this.env.show_sig = true;
+      if (this.env.opened_extwin)
+        return;
+    }
+
     var cursor_pos, p = -1,
       id = obj.options[obj.selectedIndex].value,
       input_message = $("[name='_message']"),

program/steps/mail/compose.inc

@@ -170,6 +170,9 @@ $OUTPUT->set_env('compose_mode', $compose_mode);
 $config_show_sig = $RCMAIL->config->get('show_sig', 1);
 if ($compose_mode == RCUBE_COMPOSE_EDIT || $compose_mode == RCUBE_COMPOSE_DRAFT) {
   // don't add signature in draft/edit mode, we'll also not remove the old-one
+  // but only on page display, later we should be able to change identity/sig (#1489229)
+  if ($config_show_sig == 1 || $config_show_sig == 2)
+    $OUTPUT->set_env('show_sig_later', true);
 }
 else if ($config_show_sig == 1)
   $OUTPUT->set_env('show_sig', true);