The `Surface_Workbench` icon is the same as `Surface_Surface`,
which is now an SVG and not XPM.
The lines are thicker and the colors have been adjusted
with a gradient, instead of being solid and plain looking.
Also the following were updated: `BSplineSurface`,
`BezierSurface`, `Cut`, `Filling`, `Sewing.
The `BezierSurface`, `Cut`, and `Sewing` icons are not currently used
in the workbench, but they were still updated in case
a future command uses them.
Replace the hard-coded XPM icon in `InitGui.py` for the workbench
with an SVG file, which at this time is identical to the `Surface` icon.
Change `CMakeLists.txt` to properly install this new icon.
Rename all icons, so that all have the `Surface_` prefix.
Use the new icon names in the viewproviders and task panels.
for Drawing, Image, Inspection, Mesh, MeshPart, Part, Path, Points, Raytracing, ReverseEngineering, Spreadsheet, Start, Surface, Web
TODO: fix several -Woverflow in area