Bug fixes, Code modernisation

• Add possibility to cancel uploads
• Add option for deleting images after upload
• Add compatibility with Optimize Storage (iCloud)
• Preserve image format after resize whenever possible
• Fix metadata partly lost upon download
• Fix PNG format replaced with JPEG
• Fix issues encountered with iOS 11 and iPhone X
• Fix minor bugs
• Danish and Indonesian translations
• Code modernisation

Look at the list of issues closed by this release.