BUG: Update OpenIGTLinkIF Git Tag. Fixes #3724

Transforms don't update after loading from saved scene.

From: Junichi Tokuda <tokuda@bwh.harvard.edu>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23304 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Add Multi-sampling option

This commits leverage the functionality already added in CTK [1] by
adding "Views" settings panel allowing to enable/disable
anti-aliasing.

[1] https://github.com/commontk/CTK/commit/b39d95edd9be0965a85bcd9fbc12bb64edb9041a

From: Eric Larson <larson.eric.d@gmail.com>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23305 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: N4ITKBiasFieldCorrection: Restore original default for iteration number.

This commit reverts the change added as part r21845 to resolve issue #3034

To be compatible with code expecting the original default value, the value
is changed back to to "50,40,30".

From: Andrey Fedorov <fedorov@bwh.harvard.edu>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23306 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Editor: paint using pixel mode if brush size is too small

For volumes with anisotropic spacing the minimum brush size in the paint
tool may be smaller than the pixel size. When a the brush size is smaller
than the pixel size then no pixels are filled when the user clicks on the
image, which is very confusing for the user.

Implemented solution: added a check in the PaintEffect tool so that if
the brush size is too small then pixels are painted using paintPixel mode.

From: Andras Lasso <lasso@queensu.ca>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23307 3bd1e089-480b-0410-8dfb-8563597acbee