[web] Use the new '/ajax' URL path to access the AjaxController (closes #2758254) 5a81fa526b30 took care of all the JS code, this patch cleans up the remaining python bits.

include *.py
include */*.py
recursive-include data *.gif *.png *.ico *.css *.js
recursive-include i18n *.po
recursive-include wdoc *