Hedgewars: Sound option, hear only music
completed by: Mitchell
mentors: Andrey Korotaev, Xeli, koda
Add one more option to audio configuration: right now you can turn off sound completely or just turn off the music. Implement the possibility of turning off only sound effects while leaving music on. See QTfrontend/ui/page/pageoptions.cpp and hedgewars/uSound.pas where (most of) such options are configured.
Deliverables: A working patch, that applies cleanly to our source tree. This patch should be in the form of a pull from clone,
hg export or unified diff format (in order of preference) implementing the functionality required.