* 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.
In particular, there was a typo that kept library values from being
updated, and there was missing logic to fetch the various field names
from the library parts (and the change-to part).
Also implements some performance gains by desisting from copying
LIB_FIELDs around every time we want to look at them.
Fixes https://gitlab.com/kicad/code/kicad/issues/6733
Fixes https://gitlab.com/kicad/code/kicad/issues/6749
Wayne Stambaugh
Seth Hillbrand
Jeff Young
Ian McInerney
Marek Roszko
Michael Kavanagh