Changed Photo UI to have bigger icons

Signed-off-by: Michalis Vitos <info@michalisvitos.gr>
Replaced .png images at PhotoUI with .svg

Signed-off-by: Michalis Vitos <info@michalisvitos.gr>
Replaced photo button with svg

Signed-off-by: Michalis Vitos <info@michalisvitos.gr>
Improved Bitmap handling on Photo previews that may caused OutOfMemoryError exceptions in some devices

Signed-off-by: Michalis Vitos <info@michalisvitos.gr>
Better Bitmap handling on FileImageItems that could cause OutOfMemoryError exceptions

Signed-off-by: Michalis Vitos <info@michalisvitos.gr>