* Initial attachment list changes

* Merge attachment list and uploads

* Move upload mechanisms to op-attachment

* Refactoring attachment styles

* Fix state handling of attachments

* Drag and drop works

* Improve drop zone styles

* Small style improvement

* Remove debug log

* Finished wiki attachments upload spec

* Attachments upload spec for forum works

* Add feature spec for document drag & drop

* Add feature spec for budget attachment drag & drop

* Add feature spec for workpackge attachment drag & drop

* Add default value for attachment list to fix specs

* Fix attachment list for work package create page, remove unused styles

* Fix linting errors

* Add extra checks in document attachment uplaod spec

* Adress PR comments

* Fix broken selector in spec

* Make sure to blur in the ckeditor instance

* Fix meeting module attachment spec

* Fix qa selector

* Fix eslint errors

* Fix rubocop errors