fix sketcher arrow size and make them independend from window size
+ fixes #0001547: add Part Spiral to the selectable list of profiles for a Part Loft
Merge branch 'master' of ssh://git.code.sf.net/p/free-cad/code
+ add InputField to widget plugin
+ fix crash in CmdSketcherMapSketch
+ whitespace improvements
+ do not accept objects with no sub-elements selected if this is required
fixed some obvious typos
Change "making" to "creating"

This avoids a double entendre in "making faces" and keeps consistency.
fix typos in OpenSCAD workbench
fix typos in Mesh module
fix typos and links in StartPage module
fixed typos in Part module
fix typos in PartDesign module
fix typos in Robot module
fix typos in Sketcher
Changed povray, Povray and PovRay to POV-Ray
Draft: Workaround ghost errors in move tool
Arch: stronger handling of errors in IFC export
Arch: Using 2D coordinates for polylines in IFC export