Enhance copy/paste datapoint properties by including event detectors

[nduvernois]

As of release 2.6.18, it is possible to copy paste datapoint properties from datapoint A to datapoint B. When several similar modules are present in the same installation, event detection may also be similar (in today's case, raise an alarm if an A/C in an server room does not work properly). Suggestion : offer the possibility to copy event detection from datapoint A to B at the same time as point properties are copied