Add the ability to change the speed of block mining in creative mode.

Hi Mojang studio, after you added the delay when breaking blocks in creative mode, it became inconvenient for me to build houses in creative mode, please add to the settings the ability to change or remove the delay when breaking blocks, I can recommend a minimum of 0 seconds and a maximum of 1 second, the default will be 0.25. I'll be waiting for you to add.