Merge branch 'sel_tweaks' into develop

modules/mol/base/src/impl/CMakeLists.txt

modules/mol/base/src/impl/query_ast.cc

modules/mol/base/src/impl/query_ast.hh

modules/mol/base/src/impl/query_ast_fw.hh

modules/mol/base/src/impl/query_impl.cc

modules/mol/base/src/query_state.cc

modules/mol/base/src/query_state.hh

modules/mol/base/tests/CMakeLists.txt

modules/mol/base/tests/test_query.cc

modules/mol/base/tests/test_query_standalone.cc