Add "Business is vacant"/'disused' option to editor (#526)

Signed-off-by: map-per <map-per@gmx.de>
Co-authored-by: map-per <map-per@gmx.de>
Co-committed-by: map-per <map-per@gmx.de>

libs/editor/CMakeLists.txt

@@ -33,6 +33,7 @@ set(SRC
   xml_feature.cpp
   xml_feature.hpp
   yes_no_unknown.hpp
+  keys_to_remove.hpp
 )
 
 omim_add_library(${PROJECT_NAME} ${SRC})