Unstable Imap Editor

[Robert Fewell]

It was mentioned some where it was slow to load so thought I would have a
look.

Dropping the GtkTreeModel has improved that but that has highlighted a
couple of problems so far...

1st, when retrieving 'import-map-bays', the list consists of the number of
tokens squared like this...
 imported 1 transaction which results in 3 tokens and 1 transaction which
results in 2 tokens in the file which then leads to 25 entries in the
treeview.

So for the above the list coming back from
'gnc_account_imap_get_info_bayes' is 25 entries.

2nd, when retrieving 'import-map', the list is empty despite having this
entry...

  <act:description>Checking Account</act:description>
  <act:slots>
    <slot>
      <slot:key>import-map</slot:key>
      <slot:value type="frame">
        <slot>
          <slot:key>desc</slot:key>
          <slot:value type="frame">
            <slot>
              <slot:key>'MY HEALTH</slot:key>
              <slot:value
type="guid">32282cd8503549af9cf62265df11b3c7</slot:value>
            </slot>
          </slot:value>
        </slot>
      </slot:value>
    </slot>

It seems that in account.cpp line 5642 which is..

    if (qof_instance_has_slot (QOF_INSTANCE(acc), category_head))

is returning false despite category_head being 'import-map/desc'

Hopefully I will get it sorted and create a PR for it.

Bob