Resolves: rhbz#825548 some rtf documents take vast amounts of time to load

rtf documents with vast sequences of replicated properties without any pard
resets to defaults create huge vectors of properties that eat time and memory

So if we are adding a property which already exists and there are no
intermediate properties which would cause side effects to the property then
update the existing one instead

Only implemented this optimization for some selected character properties

This takes my load time down to 7 seconds from effectively some "infinite"
hour+ load time.

Change-Id: I520779233180f4d9faf9fb0989d546e08fc6cabd

0 files changed, 0 insertions, 0 deletions