Refactoring

[aliceboizet]

• Distinguish local and global reactiveValues (global are in rv and are used in several modules)
• Renaming rv$data_plot in rv$extradata (seeing that it comes from extradata module)
• If possible, replace observe() by observeEvent()
• Remove render functions from observers.
• Specify used R packages in modules with @import annotation and use attachment::att_amend_desc() to generate DESCRIPTION and NAMESPACE files.
• use bslib accordion in get_study_data module
  ...