Fix Pauls UI bugs to do with the indent buttons.
1. If a selection range contains some list blocks, just the range is
indented.
2. If a selection range contains blocks of different indentition, abi
doesn't crash and blocks get indented as expected.
CVS:
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CVS: Enter Log. Lines beginning with `CVS:' are removed automatically
CVS:
CVS: Committing in .
CVS:
CVS: Modified Files:
CVS: src/text/fmt/xp/fv_View.cpp src/text/fmt/xp/fv_View.h
CVS: src/wp/ap/xp/ap_EditMethods.cpp
CVS:
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