Minor UI improvement. The behavior had changed when the buttons were changed from `QPushButton` to `QToolButton` in 64a95596459f8db6b5fce16a354913ac1d669344.
- uniform button layout - uniform width - fix layout issues reported by Qt Designer
FEM: ConstraintTransform: transformable surface comment modification FEM: ConstraintTransform: re-adjusted GUI layout FEM: ConstraintTransform: more tweaking FEM: ConstraintTransform: GUI layout adjustment FEM: ConstraintTransform: GUI bug fix FEM: ConstraintTransform: implemented App::PropertyEnumeration for type of transform