d3f063cc, by instead restricting the use of the
Boost pointer containers to non-inline code (watch out for implicitly generated
copy ctors and copy assignment ops), thus preventing MSVC from trying to
generate full template instantiations of those containers (similar to
f4227c82 "Blind fix for MSVC, take two").

Turns out the ScConditionalFormat copy ctor was unused anyway (but the
ScConditionalFormatList copy ctor isn't, so only prevent generation of an
implicit copy assignment op there).

Change-Id: I23303a98df7024dbce95638ac13097b71a9c5c04