Add explainer text for bulk upload
@danjela here is the explainer text for the bulk upload modal:
Bulk upload only supports uploading one or more Word documents using the Bookshelf Word template and styled according to the specifications provided in the NCBI Bookshelf Author Guide.
Supplementary files must be uploaded directly to the associated chapter.
The document filename is limited to 19 characters. Filenames:
- should only contain letters, numbers, dashes, periods, and underscores
- must not begin with a numeral
- must not contain spaces.
Make sure each document has a unique filename. Duplicate filenames within one book will cause problems in the publishing process.
WARNING! Do not modify the Word document filename for an existing record when you are updating it.
Please note that it can take up to 20 to 30 minutes before a preview is available. Any errors in preparing the preview will be reported before a preview may be generated.