Rich Text editor should enter normal new line when using shift+enter

...ssets/javascripts/content_editor/extensions/hard_break.js

...assets/javascripts/content_editor/extensions/paragraph.js

glfm_specification/output_example_snapshots/html.yml

...t_editor/components/bubble_menus/link_bubble_menu_spec.js

..._editor/components/bubble_menus/media_bubble_menu_spec.js

...tor/components/bubble_menus/reference_bubble_menu_spec.js

spec/frontend/content_editor/extensions/hard_break_spec.js

spec/frontend/content_editor/extensions/html_nodes_spec.js

spec/frontend/content_editor/extensions/image_spec.js

spec/frontend/content_editor/extensions/paragraph_spec.js

...frontend/content_editor/extensions/paste_markdown_spec.js

...rontend/content_editor/remark_markdown_processing_spec.js

spec/frontend/content_editor/test_utils.js

spec/scripts/lib/glfm/update_example_snapshots_spec.rb