Bump webpack from 4.38.0 to 4.39.1

Bumps [webpack](https://github.com/webpack/webpack) from 4.38.0 to 4.39.1.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v4.38.0...v4.39.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: npmbuildbot[bot] <npmbuildbot[bot]@users.noreply.github.com>

files_external: proper user context for sharing

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Make sure we only fetch the file by id for the actual owner

Standardize scrollbar color and width across Webkit and Firefox

log circles and remote shares in admin_audit

Signed-off-by: Sascha Wiswedel <sascha.wiswedel@nextcloud.com>

Fix permission check on incoming federated shares

Otherwise this will fetch all mounts for the file id which is quite
expensive and causes long saving times in big sharing structures

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Add form-action CSP element

Signed-off-by: Jan-Christoph Borchardt <hey@jancborchardt.net>

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

Since federated shares have their permissions set on the node, we do not need
to check for parent share permissions. Otherwise reshares of incoming federated
have no permission variable defined and creating them will fail

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Validate urls in theming settings and properly handle error messages

Add missing password reset page to vue

setting unsafe-eval is deprecated

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Signed-off-by: Julius Härtl <jus@bitgrid.net>

This will be removed in a future version of Nextcloud.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

Remove unused OC\Share\Share::checkPasswordProtectedShare

Fix/xss/on favorite file

More precise error message when expected filesize does not match

Add proper PostLoginEvent

Set proper defaults for v-tooltip usages

Do not document the obvious

Signed-off-by: Julius Härtl <jus@bitgrid.net>