Maja Kudlicka

Unable to delete data from multiple columns if most-left column is of type checkbox

1

### Description It is not possible to delete data from multiple columns at once (by selecting them and pressing "delete" key) if the column most to the left happens to...

- [x] My issue title starts with `[bug report]` - [x] I have read the [README](https://github.com/valor-software/ng2-dragula), especially the ['classic blunders' section](https://github.com/valor-software/ng2-dragula#classic-blunders), and the [dragula docs](https://github.com/bevacqua/dragula). - [x] I have searched...