Check for changed text in setText(immediate)
Check for changed text in setText(immediate)

Fixes #528

Thanks @tobspr

photonstorm/phaser-ce,photonstorm/phaser-ce,yupaul/phaser-ce,yupaul/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce