- At TImageStoryItem.LoadAnimation storing file data and file format (file extensions) via Content/ContentExt properties (for Lottie, Telegram Stickers, GIF, WEBP [last two can be animated, or not])

- At TStoryItem.Loaded, not calling Load when Content property is not Assigned (=nil) [was not loaded from stored data]
- Bumped version info to 0.7.6 for all platforms
- Bumped Android version code to 10 (need to increment this for every release to Google PlayStore)

Author: birbilis