Set their parent to nullptr before deleting (as the board may have
already been deleted).
Likely fix for Sentry KICAD-79.
(cherry picked from commit 13e79af8a0)
1) Import leaders
2) Drop radius and angle dimensions
3) Import dimension text sizes
4) Correctly interpret which side dimension offset is on
5) Correclty handle offsets for non-cardinal dimensions
Fixes https://gitlab.com/kicad/code/kicad/issues/10763
* Fix multi line text alignment.
* Parse schematic frame objects and convert them to lines.
* Make implicit global labels normal size so they can easily be seen.
* Move sheet fields to a more sensible position.
* Parse schematic symbol instances before wires so that the implicit power
connections can properly be tested. This will be used at a later time.
* Scale label text size down to allow for differences in label offset and
graphical items.