Bug fixes

## [8.x-2.0]
### Added
- This changelog file
- New configuration fields for handle new logic for generate RSA keys
- Functionality for generate new RSA keys for test and production environment
- Possibility to define identifier field for the customer
- Payment service production public RSA key
- Possibility to display summary for configuration
- Possibility to display shop public key
- Update hook for create new table
- Logic for prevent against process 2 payment responses at same time.

## [8.x-2.0]
### Added
- This changelog file
- New configuration fields for handle new logic for generate RSA keys
- Functionality for generate new RSA keys for test and production environment
- Possibility to define identifier field for the customer
- Payment service production public RSA key
- Possibility to display summary for configuration
- Possibility to display shop public key
- Update hook for create new table
- Logic for prevent against process 2 payment responses at same time.

• Lightning Core now supports attaching pictures to user accounts, and includes
  a Compact display which displays the user's picture and name, both optionally
  linked to the user's profile. (Issue #3026959)
• Lightning Core now includes a "Long (12-hour)" date format, which formats
  dates and times like "April 1, 2019 at 4:20 PM".
• Fixed a bug where Lightning's utility to convert descendant profiles to the
  Drupal 8.6-compatible format would fail if the active profile was itself a
  descendant profile. (Issue #2997990)

Fixing install config so that theme works with all install profiles and setting up the install page twig.

• documentation updated
• leaflet markercluster js embedded library updated to version 1.4.1
• leaflet js embedded library updated to version 1.4.0
• leaflet_markercluster submodule implemented (into del module subfolder)
• markercluster control and additional options settings implemented both in the Leaflet Formatter and Leaflet Map View Style
• leaflet.make.example file removed
• leaflet_views submodule moved into the module subfolder.
• Support implementation for leaflet path/geometries style settings.

Updated checkout panes to be compatible with #2710999: Implement ajax pane refreshing.

Tagging this release as stable since we no longer require patches to Commerce.