No auto-scrolling for line tools, don't connect bézier, add new objects to last group

[digorydoo]

I like Affinity Designer very much. Here are a few suggestions how it could be made even better:

* An option to turn off auto-scrolling for line tools. Auto-scrolling is mostly only useful with the selection tool.

* An option to automatically deselect the selection when I switch to the bézier tool, to avoid connecting the new object
  to the selected object. Connecting the new curve to the selected one is useful too, so I suggest using a modifier
  key to switch between these behaviours.

* Some way to tell where newly created objects will be added.
  New objects tend to get added at the very top (except when they don't).
  I usually divide my drawing into groups, and want newly created objects to
  be added to the group I'm working on. I almost never want objects at the
  top of the hierarchy.