v4.18.0

New

• [native] Display breadcrumbs when not in root folder
• [native] Implement bookmarks import

Fixed

• NextcloudBookmarks: Improve error message when bookmark creation fails
• [native] Log in production
• [native] NewAccount: Show IMPORTEXPORT button
• [native] Remove pull-to-refresh for now as it's buggy
• [native] Home#checkForIntent: Fix share routine
• Don't cast item IDs to boolean inside if statements
• NextcloudBookmarks: Report all statuses > 400 as HttpError
• [native] Options & NewAccount: Allow setting sync interval on android
• AccountCard: Display last sync time on error
• TEST_WEBDAV_SERVER: Improve error message