The 3D viewer panel had a default size that was causing sizing issue
with the footprint properties dialog. Set the default size to -1;-1
and set the proportion setting to 1 when adding the panel to the sizer
which allows the panel to file in the correct size.
Fixed some minor control spacing issues in the footprint properties
dialog properties tab.
Please note that is only a partial fix for this issue. There is still
too much vertical space which is partially due to the use of wxSpinCtrl
instead of wxDoubleSpinCtrl.
Fixes lp:1742701
https://bugs.launchpad.net/kicad/+bug/1742701
650207a6e1