Change Logs for v7.1

[ui-fix] Help link alignment #2046

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[fix] Scheduler fixes for Integration Services

* OAuth 2.0 Classes Added

Added oauthlib in requirement.txt
Added class WebApplicationServer for Authorization code grant and Bearer tokens.
Added class OAuthWebRequestValidator for Validating Oauth Request for Web Application

* copied code from mnt_oauth needs review

* [New] OAuth2 Doctypes and endpoints added

Integrations > OAuth Provider Settings
Integration Broker > OAuth Bearer Token
Integration Broker > OAuth Authorization Code
Integration Broker > OAuth Client
endpoints for authorize, approve, get_token, revoke_token and test_resource

* oauth2.py: renamed skipauth to skip_auth

* [Fix] Parse URL instead of storing it in settings

* [Fix] get skip_auth from OAuth Provider Settings

* Success URL format. Failure URL added. Confirmation dialog layout changed.

* Validate access token if passed during use of REST API

* OAuth Confirmation colours fixed

* Multiple Changes

Added links for OAuth under Integrations in Module list.
Updated permissions on OAuth doctypes.
Updated layout of OAuth Client doctype.

* [Docs] Integrations > How to setup OAuth

* [Docs] Integration > Using OAuth

* [Fix] get_token endpoint must to handle POST request

* [Fix] http verbs and responses for OAuth 2.0 Endpoints

* [Fix] accept oauth2 access_token from headers

* Removed unused imports from api.py

[Documentation] Fixed images in how to make report

Zambia currency updated

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* [gantt] show popover on hover, code cleanup

* [gantt] use variables instead of hex

Updated Cheatsheet