Merge pull request #1189 from ximenesuk/chgrp-delete-python-tests-pixels

Avoid creation of Pixels files in chgrp and delete tests
Remove BREW_DIR variable: use /usr/local for Homebrew installation
Merge pull request #1192 from will-moore/turn_off_fileset_in_right_panel

Remove fileset thumbs from right panel
Merge pull request #1193 from will-moore/activities_web_bugs_May21st

Don't show green tick if delete Error. See #10900
Thumbs table text white on selection
Don't overwrite System properties (see #10828).
Handle folder import (see #10943)
Format result.
Use StringBuffer.
Remove code no longer required.
how the busy icon while scanning
Handle the case of checksums failures.
Remove unused imports.
Handle failure during scanning and skipped files.
Fix sequence of imports.
Remove unused fields and methods.
Filter only if mix of success and error.
Enable or not Log file
Do not centre the checksums.
Fix upload failure

The changes introduced to support folder annotation
broke upload error support.