Dcoraid

- fix: fall-back to resource size estimation via S3 download header
- tests: fix tests that checked resource size after upload

- fix: convert resource file extensions to lower-case (81)
- fix: escape html characters in logging panel
- enh: improve error message when registered dataset ID does not exist (82)
- setup: bump dclab to 0.62.7

- fix: generally increase timeout for package_revise

- feat: check for updates when starting the DCOR-Aid GUI
- fix: when checking resource existence for a dataset, do not call
"package_show" for every single resource
- fix: use `verifiable_files` instead of `verified_files` in error message
before verifying messages
- fix: possible exception during upload verification with flaky connection
- enh: increase timeout for "package_show" in `UploadJob` to 500 s
- ref: renamed `resource_dict` to `check_resource_dict` in `resource_exists`
- ref: add optional `dataset_dict` to `resource_exists`

- fix: downloads tab became unresponsive for > 100 downloads

- fix: check for already uploaded resources before attempting to compress
- fix: timeout parameter not passed to `CKANAPI.get`