NO_DECODE breaks non-ascii urls, fdo#85617

Change-Id: Ic76346d20dc7fdbb5d77ba08d87f0d6c6e7b3c88
handle index based external refs in formulas in ooxml import, fdo#85617

Change-Id: Ie4f43f041f5d614b9c2826c74574c854af05c266