Added:
- Search bar: display suggestions when starting by "@" or "#"

Changed:
- Preload media in timelines to avoid jumps
- Search: Automatically switch to account tab if no results for tags

Fixed:
- Fix jumps with the fetch more feature
- Fix videos cannot be saved
- Tags cannot be pinned when there are no custom tabs
- PixelFed view: NSFW not honored
- Fix crashes