Temp down button dont work with decimals: false

[Tristyn Russelo]

Describe the bug
Thermostat is setup with compact config

type: custom:simple-thermostat
entity: climate.thermostat
header: false
decimals: false
layout:
  step: row
control: false

clicking the - (minus) button does not lower temp

• works.

using thermostat with default layout config, both - & + work.

worked it down to

decimals: false
causing issue