Few fixes.

fixes #422

modoboa/extensions/webmail/imaputils.py

@@ -512,6 +512,8 @@ class IMAPconnector(object):
         self.select_mailbox(mbox, False)
         resp = self._cmd("SEARCH", "ALL")
         seq = ",".join(resp[0].split())
+        if seq == "":
+            return
         self._cmd("STORE", seq, "+FLAGS", r'(\Deleted)')
         self._cmd("EXPUNGE")
 

modoboa/extensions/webmail/static/webmail/js/webmail.js

@@ -647,15 +647,24 @@ Webmail.prototype = {
     delete_messages: function(e) {
         e.preventDefault();
         var $link = get_target(e, "a");
+        if ($link.hasClass("disabled")) {
+            return;
+        }
         var msgs = this.htmltable.current_selection();
         var selection = [];
+        var unseen_cnt = 0;
 
         if (!msgs.length) {
             return;
         }
         $.each(msgs, function(idx, item) {
-            selection.push($(item).attr("id"));
+            var $tr = $(item);
+            selection.push($tr.attr("id"));
+            if ($tr.hasClass("unseen")) {
+                unseen_cnt++;
+            }
         });
+        this.change_unseen_messages(this.get_current_mailbox(), -unseen_cnt);
         $.ajax({
             url: $link.attr("href"),
             data: {mbox: this.get_current_mailbox(), selection: selection},

modoboa/extensions/webmail/templatetags/webextras.py

@@ -77,7 +77,7 @@ def listmailbox_menu(selection, folder, user):
          "class" : "btn"},
         {"name": "totrash",
          "label": "",
-         "class": "btn",
+         "class": "",
          "img": "icon-trash",
          "url": reverse("modoboa.extensions.webmail.views.delete"),
         },
@@ -104,7 +104,8 @@ def listmailbox_menu(selection, folder, user):
          },
         ]
     if folder == parameters.get_user(user, "TRASH_FOLDER"):
-        entries[2]["menu"] += [
+        entries[1]["class"] += " disabled"
+        entries[3]["menu"] += [
             {"name" : "empty",
              "label" : _("Empty folder"),
              "url" : reverse(webmail.views.empty, args=[folder])}