I'm not a big fan of Hungarian notation, but since we use it, let's
be consistent.

Since doing a hard re-calc can be slow, let's not do this for all
loading test cases, but only when we are testing formula interpretations.

Since each instance refers to a single file format, while its array
instance holds multiple instances of this structure.

we can't assume that always all formulas are recalculated, we might used
cached results

The dashed line is now 1px wide and has smaller dashes. The separator
button has also smaller padding.

For LibO, that just means replacing sal/cppunit.h with sal/precppunit.hxx.

sb140: #i117698# no implementations of XIdlClassProvider remain, so code that checks for it can be removed