Removed rows not filled in with Pagination extension

[kriszyp]

When you use the Pagination extension with an Observable store, updates to the first and last row cause the rows to disappear, because the Observable assumes that an update that moves an object to the first or last position may actually belong to a different page. Also, if any of the rows are removed, the page no longer has the correct number of rows. The Pagination extension should probably do a query for another row to fill up the rest of the page, to deal with removed rows and the last row disappearing. For the first row disappearance, we may need to requery the whole page.

[kriszyp]

#343

[ghost]

Fixed with 6603fca and 40b47a3