Update Nokia Imaging SDK to 1.2.114-beta
Use ImageFusionFilter in GifExporter
Add GifViewer page for viewing saved GIF animations
Fix concurrency bug in saving
Show correct background in preview animation
Allow save only after modification
Display image grid items as Buttons
Fix issue when applying frame before playing preview
Use local version of ImageTools instead of NuGet repository
Update Nokia Imaging SDK to 1.2.115