I am on CM11 and have the same issue. you can go to language & inputs in Settings and find the physical keyboard and change the layout to the Photon QWERTY layout. unfortunately that only fixes your : and ; keys, it does nothing for the now useless sym key... the lack of a working sym key means i`m constantly switching between hardware and soft keyboard to type messages. i hope some fix can be merged into CM11 to fix this!
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Thanks for the tip! Was just as you say, leaves the SYM key still not working but I use :::: a lot so very helpful to me still.