If multiple trackers are selected, Ctrl+C will copy only one of them
while the context menu will copy all of them. Fix this inconsistency.
Closes#2675.
Change project directory structure according to application structure.
Change 'nox' configuration option to something more meaningful 'nogui'.
Rename 'Icons' folder to 'icons' (similar to other folders).
Partially add 'nowebui' option support.
Remove QConf project file.