Checklist drag handle now at the left side (same place as for the checklist items)
Checklist drag handle now at the left side (same place as for the checklist items)

- most people scroll with their right thumb, so it happens sometimes
  that they move whole checklists by accident.
- this fixes the problem, and also it looks more clean than a drag
  handle in the middle of the screen

wekan/wekan,wekan/wekan,wekan/wekan,wekan/wekan,wekan/wekan