Add sorting/filtering in Marketplace and My NFTs pages

[joannerd]

Originally posted by @cryptotester in #42 (comment)

May I add also to improve this page in general, like add sorting by:

• rarity (e.g. 100s edition comes before 200s etc.)
• name
• purchase price
• purchase datetime
• actual lowest value (compare the same item being sold and show its minimum price in the market, and show the price too, so you know how much it's worth the cheapest one now)
• other sorting...

Feel free to create a new issue if you think this is a new feature. But since you said you have some new designs in progress maybe you wanted to improve this page already and this could be related too.