[BUGFIX] Problem with special character in files and folders

This patch sanitizes the file name when creating a new file
in the file list.
Folder names already get sanitized.

Change-Id: If97b4a2f41de1334a2b07add6afc1f9d99af3117
Fixes: #42873, #42933
Releases: 6.0, 6.1
Reviewed-on: https://review.typo3.org/17487
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
[BUGFIX] FAL: update wizard fails if file does not exist

The FAL update wizard throws an exception during migration if a file is
missing. As we cannot do that much about a missing source file, we
should at least not fatal here, but give the user a warning message in
the logs instead.

Change-Id: I3ab0ecd8d8f60e782b7459d7f92f89d2c0a9fd40
Resolves: #42882
Releases: 6.1, 6.0
Reviewed-on: https://review.typo3.org/16533
Reviewed-by: Franz Holzinger
Tested-by: Franz Holzinger
Reviewed-by: Francois Suter
Tested-by: Francois Suter
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-on: https://review.typo3.org/17489
[BUGFIX] LocalDriver needs to respect "is_writeable"

The LocalDriver needs also to respect the flag "is_writeable".
This means: if the flag is not set, no folder/file can be edited/moved...

Change-Id: I6fc1edd452555381388bd5bfaa46dd8241dc853b
Fixes: #44370
Releases: 6.0,6.1
Reviewed-on: https://review.typo3.org/17413
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-on: https://review.typo3.org/17490