Beginning Recent Files realization
Saving recent files in QucsSettings
Added basic functionality with recent files. TODO: move file, which already in list to first position.
Recent Files Menu fully realized
Removed debug printing
Merge pull request #24 from ra3xdh/RecentFiles

Recent files
Adiing to list files from projects is realised
Merge pull request #25 from ra3xdh/RecentFiles

Adding to Recent Files list files from project content is realised