[PD] fix primitives issues

- to avoid invalid results:
 - don't allow to set equal radii for cones
 - don't allow to set equal wedge parameters
 - don't allow zero quantities like e.g. the box width

- use full internal precision because it must be possible to create an e.g. 23.5 um wide box and using the default 2 displayed digits

- take spinbox limits from App

- add missing tooltips

- remove disturbing commented out line from Workbench.cpp

- some coding style issues fixed automatically by the MSVC IDE

src/Mod/PartDesign/Gui/Workbench.cpp

@@ -540,7 +540,6 @@ Gui::MenuItem* Workbench::setupMenuBar() const
           << "Separator"
           << "PartDesign_Boolean"
           << "Separator"
-          //<< "PartDesign_Hole"
           << "PartDesign_Migrate"
           << "PartDesign_Sprocket"
           << "PartDesign_InvoluteGear";