Request all contacts no longer needs value=.

This reverts 1c8b693 and it's possible thanks to removing
listRequiresDot option 6b2ec7a

Listing contacts didn't work for sources with listRequiresDot
set to YES (LDAPSource, by default, had this option that way)

UI/WebServerResources/ContactsUI.js

@@ -24,8 +24,6 @@ function openContactsFolder(contactsFolder, reload, idx) {
         if (searchValue && searchValue.length > 0)
             url += ("&search=" + search["contacts"]["criteria"]
                     + "&value=" + escape(searchValue.utf8encode()));
-        else
-            url += "&search=name_or_address&value=.";
         var sortAttribute = sorting["attribute"];
         if (sortAttribute && sortAttribute.length > 0)
             url += ("&sort=" + sorting["attribute"]