This commit re-enables the programmatic grades support on LTI AGS. This allows complex tools to manage grades on their own.
The default value keeps the old behavior (declarative mode).

* Improve content presentation and add multiple content display support

This commit:
* Improves LTI content presentation handling, and correctly displays LTI DL content in the LMS
* Adds support for presenting multiple DL content items on the same block

* Addressing review comments

* Nits

* Improve test and fix issue

[BD-24][TNL-8072]

* Improve logging and error message presentation

* Add full deep linking content data on studio

* Internationalize LTI 1.3 templates

* Add translation tooling

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

* Update translations

* Address review comments

* Additional logging improvements

* Address review comments, fix test

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

* Implement ltiResourceLink content presentation

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

* Add tests

* Fix serializer required fields issue

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

* Update version and changelog

This implements the endpoint that LTI tools use to return the deep linking configuration to the LMS, along with the `ltiResourceLink` type to allow testing with demo tool.

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

Remove the OIDC view from XBlock and return OIDC url directly.

* Move LTI 1.3 Key management to model

This:
- Removes the need to load the modulestore on every public keyset endpoint call.
- Simplifies the block structure and parent method overrides.
- Removes private key, client id and related parameters from XBlock fields

It also includes a migration from the data stored in the block to the model.

* Cleanup unused test helpers

* Version bump

* Addressing review comments

Co-authored-by: Sankar Raj <sankar.raj@crystaldelta.com>

This change moves the LTI configuration retrieval to
a Django model that will LTI configuration.
The current model proxies back the to blocks to keep
backwards compatibility.

See reasoning for change at:
https://github.com/edx/xblock-lti-consumer/blob/master/docs/decisions/0001-lti-extensions-plugin.rst

This is just to keep it in line with other xblocks that define
an is_past_due attribute. Nicer if they all have the same access
pattern.

k# Please enter the commit message for your changes. Lines starting

Also fixes a few untreated exceptions and remove unused variables.

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

This commit adds support for the LTI 1.3 Access token endpoint, as detailed in the IMS Security Framework.
The token is generated using the consumer's private key (stored in the XBlock) after validating the message sent by the LTI Tool using it's public key.

Signed-off-by: Giovanni Cimolin da Silva <giovannicimolin@gmail.com>

Features:
Implement LTI 1.3 launch support.
Add LTI 1.3 passthrough views as LMS plugins.

This shows the 'problem' icon for LTI units, rather than the default
'other' icon.

AA-75

removed web_fragment deprication warnig

fixed import sequece

updated bleach

Added img to bleach safe tags

Added img to bleach safe tags

Added img to bleach safe tags

added test

added test

added test

added test

added test for attr image

added test for attr image

fixed style bug

Updated format xoe

removed extra formatting

Updated to run tests on both python 2 and 3.

PROD-774

Overview
---------
This pull request makes this XBlock extensible for
adding parameters to the LTI provider in addition
to the existing ones.

Why
---
A customer needs `team` and `cohort` informaiton
to be passed through the LTI channel to simplify
integration with their LTI provider. At the same
time we'd rather not fork the XBlock, so an
Open-Closed model is needed.

More Detailed Documentation
---------------------------
I've added a couple of sections to `README.rst`
to document specifying design and
configuration steps of the new LTI parameter
processors. Please check it out for more
information about the changes that this pull
request introduces.

Example Usage
-------------
I've written a package that we'll need to use for
our customer to pass some personal user
information in addition to the cohort and team
info: https://github.com/appsembler/tahoe-lti/pull/1

Omar Al-Ithawi @ Appsembler

removed ugettext around display name also

This allows this xblock being hooked into get_course_lti_endpoints for
discovering LTI result/outcome endpoints.

asadiqbal08: Updated branch as per suggestions
asadiqbal08: Addressed PR feedback
mattdrayer: Rebased branch, addressed merge conflict