Changes

Bug #14770

Whatever a rich content of a contribution is added or updated, check
the content cache for text to decide if a notification about
contribution modification has to be triggered (in the case such notif
is supported).

Bug #14752

Fix bug by using the more adequant OWASP Encode method.

Bug #14802

The bug was caused by the fact the sender isn't specified by default in
the invitation sending. In fact, this is normal as by default the sender
is the current requester. We have just to check the destinator isn't
the sender himself.

Bug #14659

Fix the bug. The access to the directory shouldn't be conditionned by
the enabling of the directory access entry in the banner.

Bug #14854

ConverseJS plugins required to be adapted for Silverpeas in order to
work properly within Silverpeas.

Add a README for the Converse.js plugins in order to inform any devs the Converse.js plugins require to be adapter to Silverpeas

Bug #14787

Add a new sys event notifier for changes in the user roles for a given
component instance. The related event is UserRoleEvent.
Two listeners are added for this:
- one for events about a user being removed from a user group
- one for events about a change in the right profile of a component instance
The first one figures out all the roles the group plays in all the
component instances in order to send a notification about the user not
playing anymore the role played by the group.
The second one figures out the users who are removed from the right
profile either directly or through a group removed from the right
profile in order to send a notification about those users not playing
anymore the role related by the right profile.

Add a listener of UserRoleEvents in order to figure out, for each
concerned component instances, and for their nodes having local right
profiles, the users related by the event and who play a role for the
nodes. For those users, and in the case they don't play another role in
the component instance, they are removed from the right profiles of the
nodes.

Add a listener of ProfileInstEvent in order to spread to the nodes with
local right profiles the remove of any user groups.

The two listeners above invoke the NodeProfileInstUpdater service to
synchronize the changes of user roles in the component instance (and
then also in the space of the component instance) to the nodes with
specific local access rights.

Bug #14770

When checking a notification about a contribution change has to be
triggered, the case of a new form is now taken into account (it was
previously discarded).