Different images for different size icons are in the same .ico file. Windows will pick the correct size one as needed. This is built into openscad.exe via the openscad_win32.rc file.
new file: icons/openscad_doc.ico
- Move images to icons folder
- Move "Show welcome screen" to advanced tab in preferences
- Set button styles via Qt stylesheet to handle hover and disable
- Rename config setting to "launcher/showOnStartup" and add default
Programming is not a valid category of .desktop file, it is not listed in either [Main Categories](http://standards.freedesktop.org/menu-spec/latest/apa.html) or [Additional Categories](http://standards.freedesktop.org/menu-spec/latest/apas02.html).
desktop-file-validate returns error:
openscad.desktop: error: value "Graphics;3DGraphics;Engineering;Programming;" for key "Categories" in group "Desktop Entry" contains an unregistered value "Programming"; values extending the format should start with "X-"
This changes it to Development, witch is a valid category listed in Additional Categories. Now desktop-file-validate only gives us a hint:
openscad.desktop: hint: value "Graphics;3DGraphics;Engineering;Development;" for key "Categories" in group "Desktop Entry" contains more than one main category; application might appear more than once in the application menu.
That is fine, as we want it both in Graphics and Development.
This is a valid response to #533
