[FIX] web: several minor issues with editable list

- correctly update the pager when a record is added or removed
- destroy the widgets of the removed row when the user clicks on
  'Cancel' when creating a new record
- ensure that the list always contains 4 rows (before this rev.,
  in list views with less than 4 records,   if the user created a
  new record, then clicked on 'Discard', there were only 3 rows
  left
- properly destroy field widgets when removed from the DOM

Note that the change of parent.parentID to parent.static is not a
bug fix, but it's better to use the key that indicates the type of
list element, instead of implying it from other attributes.

1 files changed, 2 insertions, 1 deletions

diff --git a/addons/web/static/src/js/views/basic/basic_model.js b/addons/web/static/src/js/views/basic/basic_model.js
index 965237e1df1..276fd4df82b 100644
--- a/addons/web/static/src/js/views/basic/basic_model.js
+++ b/addons/web/static/src/js/views/basic/basic_model.js
@@ -769,7 +769,7 @@ var BasicModel = AbstractModel.extend({
     removeLine: function (elementID) {
         var record = this.localData[elementID];
         var parent = this.localData[record.parentID];
-        if (parent.parentID) {
+        if (parent.static) {
             // x2Many case: the new record has been stored in _changes, as a
             // command so we remove the command(s) related to that record
             parent._changes = _.filter(parent._changes, function (change) {
@@ -778,6 +778,7 @@ var BasicModel = AbstractModel.extend({
         } else {
             // main list view case: the new record is in data
             parent.data = _.without(parent.data, elementID);
+            parent.count--;
         }
     },
     /**