I am not sure about changing the icons, but you can create rules to achieve this.
triggers:
- id: "1"
configuration:
itemName: DummyRollershutterItem
command: UP
type: core.ItemCommandTrigger
conditions: []
actions:
- inputs: {}
id: "2"
configuration:
itemName: Blind1
command: UP
type: core.ItemCommandAction
- id: "3"
configuration:
itemName: Blind2
command: UP
type: core.ItemCommandAction
- id: "4"
configuration:
itemName: Blind3
command: DOWN
type: core.ItemCommandAction
Same for down and stop.