Don't hold css::uno::Type instances by pointer

...in comphelper::PropertyMapEntry and SfxItemPropertyMapEntry.  And as the
arrays of such need to be initialized dynamically anyway, also change their name
members to proper OUStrings while at it.  Plus some const clean-up.

Change-Id: I67d4d7b5773fb020605f369daf39528bec930606
Remove unnecessary macro

Change-Id: I8af2e887a6ad2b345b5b214eb02095c71cdafbc2
Remove unnecessary macro

Change-Id: Ibdb27900b70b6ccebfde542b516e71c4c1a6e795
Remove unnecessary macro ITYPE

Change-Id: I9ade981c771367fd292600d73124f89b94a7a924