writerfilter: fix w14 simple types

Change-Id: I5693b7570227e1a337f03febc28f5ea336b4af7f
writerfilter: add more w14:glow attributes into GrabBag

Fix and add more attributes into the GrabBag, add attributes for
an element into its own collection.

Change-Id: I8d2e2fa35f4bc447c7e913e5c39223fc01f39d5a
ooxml: export w14:glow with subelements from a CharGrabGab

Change-Id: I3e60f0532a18eba12f7a63c3e745668f54b8806e
OOXML roundtrip test for w14:glow

Change-Id: I80dd71bad02be980229899845c1451df6f34dca5