[web/data] Fix userCallbackThenUpdateUI to completely replace old DOM elements Without the 'swap' parameter, userCallbackThenUpdateUI() would replace the _children_ of the component with a new version of the componenent, thus creating nested divs/spans/buttons/etc. Closes #4881299

addressbook
basket
blog
book
calendar
comment
company
email
file
folder
i18ncontent
keyword
link
mailinglist
person
tag
timeseries
vcsfile