Soaring Seagull: improve transitions

When leaving goods store hide it after transition so that transparent backgrounds won't overlap each other between the goods and packs sections
Soaring Seagull: expand only one item at a time
Soaring Seagull: fix expand collapse multiple times on same item view
Soaring Seagull: item currency icons on left for consistency
Soaring Seagull: improve transitions by using translations
git-ignore customer stores
Fix selector for offers menu link image
Merge branch 'dev'