Unit conversion mismatch in maximum upload file sizes

[moschlar]

The interpretation of the variables max_upload_size|max_upload_file_size|max_upload_size_mb|maxUploadFileSize|maxFileSize throughout the Seafile code base is not unified - in some places, it is used as a binary size unit, in others as a decimal size unit, leading to the effect that the size shown on the upload link page is slightly larger than what is actually accepted:

seafile/lib/python3/site-packages/seaserv/service.py
70:    max_upload_size_mb = int(get_fileserver_option('max_upload_size', 0))
71:    if max_upload_size_mb > 0:
72:        MAX_UPLOAD_FILE_SIZE = max_upload_size_mb * (2 ** 20)

vs.

seahub/frontend/src/components/shared-link-file-uploader/file-uploader.js
7:import { resumableUploadFileBlockSize, maxUploadFileSize, maxNumberOfFilesForFileupload } from '../../utils/constants';
67:      maxFileSize: maxUploadFileSize * 1000 * 1000 || undefined,
118:    if (this.maxFileSizeErrorCallback) {
119:      this.resumable.opts.maxFileSizeErrorCallback = this.maxFileSizeErrorCallback;
152:  maxFileSizeErrorCallback = (file) => {