KeeShare code formatting and spelling correction

src/CMakeLists.txt

src/keeshare/DatabaseSettingsWidgetKeeShare.cpp

src/keeshare/KeeShare.cpp

src/keeshare/KeeShare.h

src/keeshare/KeeShareSettings.cpp

src/keeshare/KeeShareSettings.h

src/keeshare/SettingsWidgetKeeShare.cpp

src/keeshare/ShareObserver.cpp

src/keeshare/ShareObserver.h

src/keeshare/group/EditGroupWidgetKeeShare.cpp