small fix in Quantity lexer
Reinstate use of default font from Draft Preferences
Fix handling of mouse events & effect on feature base point
Add icons to menus for mesh to shape and shape to mesh

Mesh to shape icon for the Part workbench Part menu
Shape to mesh icon for the Mesh design Workbench Meshes menu
Move Mesh_Mesh_from_Shape icon from Mod/MeshPart to Mod/Mesh

Move the icon Mesh_Mesh_from_Shape.svg
from .../Mod/MeshPart/Gui/Resources/icons
to .....//Mod/Mesh/Gui/Resources/icons
edit both Mesh.qrc and MeshPart.qrc accordingly
remove referrence to the icon from the command in
the MeshPart Command.cpp file and add it to
the Mesh Command.cpp file
Arch: prep work for IFC export
Arch: added structural roles to Ifc import
Arch: added alternative load mode for IFC files for benchmarking
Arch: Structural nodes - closes #1313
Add unti support to Sketcher
Mouse wheel handling in InputField
fix negative value cascading in unti schemas
fix QString header in Unit
Try to fix std::abs() error...
Fix another one....
next gcc fix
Merge branch 'refs/heads/master' into dev-assembly