[generator]A trash bin is needed to discard the wrong components I have dragged

### Is your feature request related to a problem? Please describe.

N

### Description

When I dragged a wrong components, I have to put it down and then delete it. I want to disgard it directly.

### Describe the solution you'd like

When a component is dragged up, place a trash bin somewhere, so that I can put the component into it to discard this dragging action.

### Describe alternatives you've considered

N

### Self-service

- [ ] I'd be willing to contribute this feature to DripForm myself.