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