ole32: Use the default icon title font when writing the caption text out in OleMetafilePictFromIconAndLabel.

ole32: The METAFILEPICT created by OleMetafilePictFromIconAndLabel should have its mapping mode be anisotropic, not isotropic.

ole32: Call SetWindowOrgEx and SetWindowExtEx in OleMetafilePictFromIconAndLabel so that the created metafile scales correctly.

Centre the icon and the label.

Document a few of the unknown fields in the presentation data header.

ole32: Add some tests for the IViewObject, IOleCache2 and IPersistStorage interfaces of the OLE data cache.

ole32: The advise sink for the data cache should be primed with the passed in aspects value, not an arbitrarily selected value.

ole32: Load cached data in the data cache into a STGMEDIUM type so it can be treated the same as set data.

for the future possiblity to add entries with IOleCache::Cache and
IOleCache::SetData.

- create helper function to setup exception frame and run the test
- lookup function ptr only once
- make "code data" const
- reuse global exception counter
- change alignment test to use stack address to generate an alignment exception. This avoids
  the need to pass an argument, so it can use the created helper function.
  (as the stack is (at least) 4 byte aligned, this works equally well)