Refactor changing files in web UI

app/assets/javascripts/blob/blob_file_dropzone.js

app/controllers/concerns/creates_commit.rb

app/controllers/projects/application_controller.rb

app/controllers/projects/blob_controller.rb

app/controllers/projects/commit_controller.rb

app/controllers/projects/tree_controller.rb

app/helpers/projects_helper.rb

app/helpers/tree_helper.rb

app/services/commits/change_service.rb

app/services/commits/cherry_pick_service.rb

app/services/commits/create_service.rb

app/services/commits/revert_service.rb

app/services/files/base_service.rb

app/services/files/create_dir_service.rb

app/services/files/create_service.rb

app/services/files/delete_service.rb

app/services/files/multi_service.rb

app/services/files/update_service.rb

app/services/validate_new_branch_service.rb

app/views/projects/blob/edit.html.haml