server: fixed watching a directory which is already watched: Twisted file watched is not adding a callback to a watched path when there is already one, but this can happens often in Libervia, as a whole site is recusively watched in dev mode, and tasks may want to add other watchers. To work around this, the new `_checkCallback` will recursively check that callback has been indeed added to the requested path.

#!/usr/bin/env python3


from libervia.server.constants import Const as C
from sat.core.log import getLogger

log = getLogger(__name__)
"""ticket handling pages"""

name = "merge-requests_new"
access = C.PAGES_ACCESS_PUBLIC
template = "merge-request/create.html"