macOS: Ignore custom folder icons (#2083)
macOS: Ignore custom folder icons (#2083)

MacOS allows users to use custom folder icons and saves them as a
hidden file of the given folder with the name `Icon\r`.

However, cozy-stack forbids the presence of `\r` in document names so
these icons block the synchronization.

We think it's better to ignore those files rather than blocking the
user.
cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop