Loot roll and sign-in protection

• The loot roll window (group runs, dungeons, raids and world bosses) now shows on each item whether it suits your class and whether it is better than what you wear: «▲ better», «▼ worse» or «≈ mixed». • Hover over or tap an item to open the comparison with your equipped gear, as in the bag: stat differences and item level, for rings and trinkets against both equipped. Items are compared without enchants and sharpening. • Stronger protection of sign-in and accounts: limits on rapid sign-in attempts, old sessions revoked after a block.