- modified NCC tool so for simple objects (single Polygon) the external object used as reference can have any shape, for the other types of objects the copper cleared area will be the convex hull of the reference object
- modified the strings of the app wherever they contained the char seq <b> </b> so it is not included in the translated string
- solved issue #292 where a new geometry renamed with many underscores failed to store the name in a saved project
- the name for the saved projects are updated to the current time and not to the time of the app startup
- some PEP8 changes related to comments starting with only one '#' symbol